Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.matrix.androidsdk.MXDataHandler.getMembersAsync(java.lang.String, org.matrix.androidsdk.core.callback.ApiCallback)' on a null object reference
at org.matrix.androidsdk.data.RoomState.getMembersAsync(RoomState.java:299)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void org.matrix.androidsdk.MXDataHandler.getMembersAsync(java.lang.String, org.matrix.androidsdk.core.callback.ApiCallback)' on a null object reference at org.matrix.androidsdk.data.RoomState.getMembersAsync(RoomState.java:299)
see https://github.com/dinsic-pim/tchap-android/issues/680
This crash seems due to an unexpected race condition