On the tablet I used the ebay desktop version until the app had a new
release/update... Suddenly about 3 weeks later it worked... I didn't do
anything...
I have got the same problem with a brand new Samsung Tab A (WiFi), using
Android ebay App Version 5.18.0.16. With the mobile phones that I am
using with the same WiFi but ebay App Version 5.17.1.1 it is working.