Normaly I have on the left sideof my backend a section where I can change the forum settings, view topics en also see the replies.

Now I do not have that option anymore.

I see the forum is still there on the website, but its also not possible to create a new topic or reply.

[@tiaid Participant 11 years ago]

I have fixed it , by deactivating all plugins , then first adtivated bbpress and then the rest. Now everything is fine again.