topic Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b in ArcGIS Runtime SDK for Android Questions

ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

ChristopheVan_Baalen — Thu, 13 Nov 2025 12:15:47 GMT

Hi!
I'm having some customers complaining about the maps not loading after updating to the latest version of our app. (It's an Expo react-native app with a custom implementation for Android and iOS)

The only changes we've done is updating

com.esri.arcgisruntime:arcgis-android:100.15.6

com.esri.arcgisruntime:arcgis-android:100.15.7

This only happens on the customers maps, which have a lot of data and moving stuff, but works great on my smaller test map.

In development I see this error:
ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b.
Registering an InstanceCreator or a TypeAdapter for this type, or adding a no-args constructor may fix this problem

I can't find anything related to this issue, maybe anyone of you have some idea on whats going on?

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

GuntherHeppner — Mon, 17 Nov 2025 18:07:38 GMT

@ChristopheVan_Baalen - can you check the gson dependency your app is using. The ArcGIS Runtime SDK for Android 100.15.7 depends on gson 2.9.0. If your application depends on a newer version of gson, this might be the cause of this issue.

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

ChristopheVan_Baalen — Mon, 17 Nov 2025 20:41:31 GMT

I tested adding a specific implementation dependency for gson (implementation 'com.google.code.gson:gson:2.9.0') to our custom ArcGIS wrapper for our expo/react-native app, but with no success. Still the same issue.

Some more information:
The error pops up twice: Once in Portal.addDoneLoadingListener when it’s LoadStatus.FAILED_TO_LOAD, but also for the ArcGISMap.addDoneLoadingListener with the same load status.

Here is one map that is working correctly: https://learngis.maps.arcgis.com/home/webmap/viewer.html?webmap=3476f0e5637c481b89eafd18b6620c79

And here is one of the maps which fails: https://cypsol.maps.arcgis.com/apps/mapviewer/index.html?webmap=b7c4b33f094140c18522df1c233ad184

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

ChristopheVan_Baalen — Tue, 18 Nov 2025 11:28:21 GMT

I created a simple test app for reproducing this issue:
https://github.com/chichoch/arcgis-bug

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

GuntherHeppner — Tue, 18 Nov 2025 13:44:01 GMT

Thank you! We are investigating and will get back asap...

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

GuntherHeppner — Fri, 21 Nov 2025 13:15:32 GMT

@ChristopheVan_Baalen We have identified the issue as a bug in 100.15.7. We are working on a fix and will release another patch soon. Thank you for providing the repro case and apologies for any inconvenience.

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

ChristopheVan_Baalen — Mon, 24 Nov 2025 08:46:06 GMT

Thank you!
Please keep me updated on the release.

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

GuntherHeppner — Wed, 03 Dec 2025 09:28:50 GMT

@ChristopheVan_Baalen - we have a fix which is currently going through certification. We are targeting a patch release on December 10th.

Re: ArcGIS Map Error: Unable to create instance of class com.esri.arcgisruntime.internal.io.b

GuntherHeppner — Wed, 10 Dec 2025 16:45:44 GMT

We have released a fix with 100.15.8.

Release on JFrog: https://esri.jfrog.io/ui/native/arcgis/com/esri/arcgisruntime/arcgis-android/100.15.8/
Release note: https://developers.arcgis.com/android/release-notes/release-notes-for-100-15/#100158