The app stops after being loaded only if the WIFI internet connection is on.
If the WIFI is disabled, thus there is not internet available, it works fine. So, offline OK, online KO.
The app has worked online during the last 2 years. The problem started 2-3 weeks ago.
The tablet has 2G RAM 64 GB FLASH and it runs ANDROID 5.0
Is there any incompatibility?