https://community.esri.com/t5/arcgis-instant-apps-questions/instant-apps-basic-configuration-panel-freezes-on/m-p/1687243#M3649 <P>I am experiencing a critical issue with ArcGIS Online Instant Apps (Basic template) on a public (individual) account that is not connected to any organization.&nbsp;Issue started recently (after latest Instant Apps update – Calcite Components 5.0.2)&nbsp;When creating a new Instant App, even from a brand-new Web Map without any custom layers (no GeoJSON, no WMS, no search configuration), the configuration panel behaves incorrectly.&nbsp;Opening the app configuration works.&nbsp;Clicking the “Share” button opens the publish panel.&nbsp;After the panel appears the “X” button does not close it.The rest of the UI becomes unresponsive.&nbsp;The only clickable button is “Publish”. Clicking “Publish” causes the page to freeze completely.&nbsp;The same behavior occurs with newly created Web Maps,&nbsp;default settings only</P><P>Console errors (relevant excerpt):</P><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV>mapA11yDesc does not have a default value defined.<BR />measureAreaUnit does not have a default value defined.<BR />measureLinearUnit does not have a default value defined.<BR />enableHighlightColor does not have a default value defined.<BR />enableHighlightHaloColor does not have a default value defined.<BR /><BR />Uncaught TypeError: can't access property "includes", t is null<BR />at buildSettingsPanel<BR />at _initConfigPanelUIBuild<BR />at initialize</DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV><P>The error appears to originate in ApplicationBase during configuration initialization. It looks like required default values are not being provided, and the UI attempts to call .includes() on a null value.</P><P>Has anyone else encountered this issue recently?<BR />Is this related to the recent Instant Apps / Calcite update rollout?&nbsp;Any guidance would be appreciated.</P><P>Thank you.</P> Fri, 27 Feb 2026 07:52:29 GMT HG_ 2026-02-27T07:52:29Z https://community.esri.com/t5/arcgis-instant-apps-questions/instant-apps-basic-configuration-panel-freezes-on/m-p/1687243#M3649 <P>I am experiencing a critical issue with ArcGIS Online Instant Apps (Basic template) on a public (individual) account that is not connected to any organization.&nbsp;Issue started recently (after latest Instant Apps update – Calcite Components 5.0.2)&nbsp;When creating a new Instant App, even from a brand-new Web Map without any custom layers (no GeoJSON, no WMS, no search configuration), the configuration panel behaves incorrectly.&nbsp;Opening the app configuration works.&nbsp;Clicking the “Share” button opens the publish panel.&nbsp;After the panel appears the “X” button does not close it.The rest of the UI becomes unresponsive.&nbsp;The only clickable button is “Publish”. Clicking “Publish” causes the page to freeze completely.&nbsp;The same behavior occurs with newly created Web Maps,&nbsp;default settings only</P><P>Console errors (relevant excerpt):</P><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV><DIV>mapA11yDesc does not have a default value defined.<BR />measureAreaUnit does not have a default value defined.<BR />measureLinearUnit does not have a default value defined.<BR />enableHighlightColor does not have a default value defined.<BR />enableHighlightHaloColor does not have a default value defined.<BR /><BR />Uncaught TypeError: can't access property "includes", t is null<BR />at buildSettingsPanel<BR />at _initConfigPanelUIBuild<BR />at initialize</DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV><P>The error appears to originate in ApplicationBase during configuration initialization. It looks like required default values are not being provided, and the UI attempts to call .includes() on a null value.</P><P>Has anyone else encountered this issue recently?<BR />Is this related to the recent Instant Apps / Calcite update rollout?&nbsp;Any guidance would be appreciated.</P><P>Thank you.</P> Fri, 27 Feb 2026 07:52:29 GMT https://community.esri.com/t5/arcgis-instant-apps-questions/instant-apps-basic-configuration-panel-freezes-on/m-p/1687243#M3649 HG_ 2026-02-27T07:52:29Z https://community.esri.com/t5/arcgis-instant-apps-questions/instant-apps-basic-configuration-panel-freezes-on/m-p/1687367#M3651 <P>Hi, we are able to reproduce and have logged&nbsp;<SPAN>BUG-000183113. We'll work on getting this fixed&nbsp;</SPAN></P> Fri, 27 Feb 2026 16:09:56 GMT https://community.esri.com/t5/arcgis-instant-apps-questions/instant-apps-basic-configuration-panel-freezes-on/m-p/1687367#M3651 ChryseMorales 2026-02-27T16:09:56Z