I have downloaded apps then when opening only homepage then closes,or just a white page

Hello,

Have you tried restarting your iPad?

Restart your iPhone, iPad, or iPod touch - Apple Support

Same problem on several third party apps , 13.6.1 started the problem , prior to that all worked fine.

Same problem showed up on public beta 14, but expect issues on beta not on tweaks of current system.

have of course rebooted items involved.