A few vBulletin 4 errors I need help on

[Videx]

You're going to have to uninstall vbseo if you expect a lot of help here. Or take it to the vbseo forums.

Once you've done that, you need to take each problem one at a time, and search for solutions at vb.com before posting here. Eventually, when you have vb4 default working the way you like it, you can install mods like vbseo and troubleshoot them.