@Dave:
I am sorry that I am preferring old systems, but, all these old smartphones are doing very well as such. Wy do we always throw away things that are doing their job? Of course, systems might evolve, better usability, new skins whatsoever ...
For a developer its hard to span the evolving Android systems, I know that, so I am not expecting to get full support.
Thank you for your answer, anyway; to your points:
The webview on my A 5.1.1 had been last updated on 8th of March 21 when I stumbled upon this issue. On Playstore, there is a lot of complains about the usability after webview updates, so I did a reset to factory basic and gave it a try, but the reaction is identical (no app start).
As it is not possible to use the hotspot of the A 5.1.1 system for DS ( DS does not recognize the hotspot as a WiFi substitute ) I used a 3rd hotspotted smartphone as replacement for the router. The result using the 192.168.43.... hotspot WiFi is exactly identical.
Well. I can live with that, no reason to try the other 2.xx versions, but, perhaps you can look for possible reasons when updating to the next version.
Regards
Jo