I am using the sdk version 8.1.0 on Android. We sometimes get a popup saying that there is a version conflict.
Version Conflict The Wikitude SDK undefined is not supported. Please update the application.
We are using an experience generated with the Wikitude studio.
According the sources generated, it seems that AR.context.versionNumber is undefined.
This happened on different devices. I didn't manage to find a way to reproduce it always. Most of the time this popup appear when the device went to sleep mode.
Try to request camera permission before opening the AR view. This solves the issue for us.