Map layers disappearing from application

dsinha — Mon, 20 Jul 2026 21:09:06 GMT

Hello, some of the layers on our public map randomly disappear when the application is opened. For example, here are two screenshots of the same map showing two different set of contents.

We are running Experience Builder on Enterprise 11.5. Any ideas on why this is happening?

Thanks for your help!

Re: Map layers disappearing from application

Brian_McLeer — Mon, 20 Jul 2026 21:24:07 GMT

Hello @dsinha, while not being able to dig in too deep, I am getting many browser console errors when I try to load the app which is probably why some show and some don't. It also might explain if you can seem them on your internal network vs a public device. It might be a firewall setting on your network or a sharing setting in Portal.

content.js:2 Uncaught Error: Minified React error #299; visit https://reactjs.org/docs/error-decoder.html?invariant=299 for the full message or use the non-minified dev environment for full errors and additional helpful warnings. at n.createRoot (content.js:2:127887) at content.js:2:141096 at content.js:2:141166 at content.js:2:141169 index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'Item does not exist or is inaccessible.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 await in K l @ init.js:58 await in l request @ init.js:484 (anonymous) @ init.js:595 Promise.then load @ init.js:595 load @ init.js:332 q.load @ layersLoader.js:14 loadFromPortal @ init.js:1141 await in loadFromPortal load @ init.js:1258 load @ init.js:332 _createLayerView @ init.js:2627 _doWork @ init.js:2621 u @ init.js:202 (anonymous) @ init.js:206 script t.injectUrl @ init.js:29 Oa @ init.js:27 p @ init.js:5 (anonymous) @ init.js:14 Pb @ init.js:24 Z @ init.js:14 (anonymous) @ init.js:28 p @ init.js:5 Ub @ init.js:28 Ra @ init.js:26 (anonymous) @ init.js:30 script t.injectUrl @ init.js:29 Oa @ init.js:27 p @ init.js:5 (anonymous) @ init.js:14 Pb @ init.js:24 Z @ init.js:14 T @ init.js:15 Ia @ init.js:15 (anonymous) @ init.js:1223 GroupLayer @ init.js:1223 p @ init.js:1211 r @ init.js:1209 (anonymous) @ init.js:1208 h @ init.js:1208 (anonymous) @ WebMap.js:51 Promise.then t @ WebMap.js:51 r @ WebMap.js:53 d @ WebMap.js:52 await in d a.loadFromSource @ WebMap.js:54 load @ WebMap.js:11 load @ init.js:332 (anonymous) @ index.js:1 o @ index.js:1 Promise.then u @ index.js:1 (anonymous) @ index.js:1 Ee @ index.js:1 createMap @ index.js:1 (anonymous) @ index.js:1 (anonymous) @ index.js:1 Me @ index.js:1 ready @ index.js:1 (anonymous) @ index.js:2 Promise.then (anonymous) @ index.js:2 Promise.then createDataSource @ index.js:2 createDataSourceByUseDataSource @ index.js:2 createDataSource @ index.js:137 componentDidMount @ index.js:137 ki @ react-dom.js:2 bi @ react-dom.js:2 yi @ react-dom.js:2 (anonymous) @ react-dom.js:2 ws @ react-dom.js:2 ls @ react-dom.js:2 S @ react-dom.js:2 T @ react-dom.js:2 postMessage x @ react-dom.js:2 F @ react-dom.js:2 n.unstable_scheduleCallback @ react-dom.js:2 Ps @ react-dom.js:2 (anonymous) @ react-dom.js:2 ws @ react-dom.js:2 is @ react-dom.js:2 Hl @ react-dom.js:2 (anonymous) @ react-dom.js:2 script C.createScript @ init.js:1 C.instantiate @ init.js:1 C.instantiate @ init.js:1 C.instantiate @ init.js:1 window.SystemJS.constructor.instantiate @ init.js:1 (anonymous) @ init.js:1 Promise.then f @ init.js:1 (anonymous) @ init.js:1 Promise.then C.import @ init.js:1 o.import @ init.js:1 (anonymous) @ index.js:2 (anonymous) @ index.js:2 o @ index.js:2 s @ index.js:2 (anonymous) @ index.js:2 (anonymous) @ index.js:2 Yc @ index.js:2 (anonymous) @ index.js:2 Promise.then (anonymous) @ index.js:2 (anonymous) @ index.js:2 Yc @ index.js:2 loadRawClass @ index.js:2 (anonymous) @ index.js:2 (anonymous) @ index.js:2 Yc @ index.js:2 loadWidgetClassByUri @ index.js:2 (anonymous) @ index.js:2 (anonymous) @ index.js:2 Yc @ index.js:2 loadWidgetClass @ index.js:2 loadWidgetClass @ layout-runtime.js:1 componentDidMount @ layout-runtime.js:1 ki @ react-dom.js:2 bi @ react-dom.js:2 yi @ react-dom.js:2 (anonymous) @ react-dom.js:2 ws @ react-dom.js:2 ls @ react-dom.js:2 S @ react-dom.js:2 T @ react-dom.js:2 postMessage x @ react-dom.js:2 F @ react-dom.js:2 n.unstable_scheduleCallback @ react-dom.js:2 Ps @ react-dom.js:2 rs @ react-dom.js:2 ts @ react-dom.js:2 Ku @ react-dom.js:2 (anonymous) @ index.js:72 Promise.then (anonymous) @ index.js:72 ri @ react-dom.js:2 Ss @ react-dom.js:2 (anonymous) @ react-dom.js:2 ws @ react-dom.js:2 is @ react-dom.js:2 Hl @ react-dom.js:2 (anonymous) @ react-dom.js:2 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Parks & Recreational Areas', id: '19e22095fe1-layer-35') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Parks & Recreational Areas', id:'19e22095fe1-layer-35' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Borough Public Parking Lots', id: 'BoroughPublicParkingLots_Carlisle_4378') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Borough Public Parking Lots', id:'BoroughPublicParkingLots_Carlisle_4378' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Rail Roads', id: 'RailRoads_Carlisle_2385') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Rail Roads', id:'RailRoads_Carlisle_2385' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Parking Kiosks', id: 'ParkingKiosks_Carlisle_3951') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Parking Kiosks', id:'ParkingKiosks_Carlisle_3951' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Municipal Boundary', id: 'MunicipalBoundary_Carlisle_7102') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Municipal Boundary', id:'MunicipalBoundary_Carlisle_7102' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Trash/Recycling Routes', id: '196e9f367e6-layer-53') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Trash/Recycling Routes', id:'196e9f367e6-layer-53' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Airport Surface Zones', id: 'AirportSurfaceZones_Carlisle_1824') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Airport Surface Zones', id:'AirportSurfaceZones_Carlisle_1824' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Fire Hydrants', id: 'Hydrants_Carlisle_8635') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Fire Hydrants', id:'Hydrants_Carlisle_8635' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Historic Preservation District', id: 'HistoricPreservationDistrict_Carlisle_1629') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Historic Preservation District', id:'HistoricPreservationDistrict_Carlisle_1629' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Bicycle Lanes', id: 'BicycleLanes_Carlisle_7571') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Bicycle Lanes', id:'BicycleLanes_Carlisle_7571' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Bicycle Routes', id: 'BicycleRoutes_Carlisle_8358') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Bicycle Routes', id:'BicycleRoutes_Carlisle_8358' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 init.js:135 [esri.layers.FeatureLayer] #load() Failed to load layer (title: 'Major Surface Water, Letort Spring Run', id: '19783aa882f-layer-53') {error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:950 init.js:135 [esri.views.LayerViewManager] Failed to create layerview for layer title:'Major Surface Water, Letort Spring Run', id:'19783aa882f-layer-53' of type 'feature'. {layer: w, error: f} f @ init.js:135 _log @ init.js:138 error @ init.js:136 (anonymous) @ init.js:2627 index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'}details: {layer: w, error: f}message: "layerview creation failed"name: "layerview:create-error"[[Prototype]]: c index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'} index.js:2 Uncaught (in promise) f {name: 'request:server', details: {…}, message: 'The connection attempt failed.'} reject @ index.js:2 error @ index.js:610 K @ init.js:72 experience/?id=37efd…fb8bf2e75263acfb7:1 Uncaught (in promise) f {name: 'layerview:create-error', details: {…}, message: 'layerview creation failed'}

Re: Map layers disappearing from application

dsinha — Mon, 20 Jul 2026 21:25:52 GMT

Thanks for the observation @Brian_McLeer. Actually, both screenshots were taken on the internal network. I am very worried what public viewers on external network are able to see (if new to the app, they may not even know that some layers are missing!!).

I wish I knew what is causing it.

Re: Map layers disappearing from application

Brian_McLeer — Mon, 20 Jul 2026 21:27:23 GMT

You're welcome @dsinha. If you have an IT Network/Support team I would probably ask them to check firewall settings/port settings/etc. (well beyond my skillset).

Re: Map layers disappearing from application

dsinha — Mon, 20 Jul 2026 21:37:22 GMT

Thanks again @Brian_McLeer. Submitted a ticket to Esri Tech Support to see if they can help identify the cause. Will report back if there is a resolution.

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