I use vivaldi browser here and after the update today I see this message
When I open the browser I see this message. It is dutch

"Je profiel kan niet correct worden geopend. Sommige functies zijn wellicht niet beschikbaar. Controleer of het profiel bestaat en of je beschikt over lees en schrijfrechten voor het profiel".
I see my profile when I take a look with dolphin.

Before the big update I don't have this problem.

Can someone tell me how to solve this?

I think there more things wrong. The computer is slow sometime. When I reboot I must wait 1.30 minutes before the computer stop and reboot.
I have created a log with octopi.

https://gist.github.com/anonymous/fbfd5d4c05f3b98351793bd03ea8171d