Unknown location!
 

I've disabled all my mods and tried and there's still the unknown location for certain mods.
It's for V3arcade and the Vbulletin blogs.

I've installed, removed all files and reinstalled and even installed older version including the allowed overwrite thingy and it's still unknown location.

What can I do?

You need to ask in the modification thread for them to fix this issue. The location needs to be defined by the modification.

I mentioned vbulletin blog.
That's no modification.

Then go ask in the blog support forum. That isn't here. And yes, the blog is a modification.