new app does not work properly with android 6.0.1 and galaxy tab 10 A

[skipperharry]

Dear team,
I have a Samsung Galaxy Tablet 10 A with android version 6.0.1. When starting your new app it tells me that I'm not online... but I'm online via wifi. Because of this the app refuses completely to work .
Hope you can help me.
Many thanks
Harald

[skipperharry]

@skipperharry 
attached screenshot of app message....