@ediko Dude what to do is a BACKUP first. Because you seem not to know all that. Then proceed with caution.

This a beautifully designed forum. Very modern.

Done! thanks.

I'm taking a backup 1st and try all that.

yes i have found/gone so far. What shall i do? Edit it? Drop it?

Well, you should install some Wordpress security protection. Here they use Cleartalk but many others also exist.

Biography field is not a wpForo field, if am not mistaken. Also registration is not controlled by wpForo.

If you do have performance issues, then try to find the cause of it. It could simply be that you need to upgrade your hosting plan. Also installing ...

@dmolina Of cource. IIS / Windows hosting is not native hosting for Wordpress.

This can't happen, unless the users use their email address as their userid/alias. That is, they make it public.

@agendavolo You may not run any caching plugins but your hoster may run one (server wide).

What do you mean? I have seen error 500 only in IIS hosting. This is why i ask and also @robert asked about it. *Unix hosters usually display differ...

This smells like a caching issue?

@paulag Do you also use IIS (Microsoft) for hosting?