[@sziban Participant 10 years, 6 months ago]

Registering and using a new user after the import is works fine as well as using an old user, registered before the import.
I tried with the bbpress v2.5.8, but I was unable to run the user-role-map repair tool either, I got the white screen there too.
Tried to turn off all the other plugins, increasing the memory, but nothing changed.
How do you think to delete all the users? Only the users or users and their posts too?
(How can I easily remove 30k users?)