The tablet app is generally a hands-off implementation since it will use the configuration from the web client.  In cases where you’re seeing errors in the tablet app but not in the web client it’s a good idea to know about tablet tracing.

Follow the instructions here to enable and consume trace logs for the tablet app:

https://technet.microsoft.com/en-us/library/hh699694.aspx#BKMK_MoCA_tracing