When I upgraded to IPB4.x I had all the mods and applications still installed. Than when I went to the applications section, it showed all that were out of date and it just asked me if i wanted to remove them so I removed all of the applications. I didn't really have that many custom tags so I don't mind resetting them up. When I tried to upload the version 4.x of the advanced tags. That is when I was getting the error.
Right now I just backed up the 3.x version of IPB and uninstalled all the mods, and applications. The only thing left is the native ones. Going to upgrade to IPB4.x tonight and will try installing the advanced tags again. I will post if it works this time, this is the only thing that I could think of to solve the issue. If it was caused by the fact that I had the old apps still active.
It is most likely because I messed up something during the installation the 1st time that caused the issue, so getting the hosting provider to do the upgrade for me this time. Although not sure how I could have messed it up, it's pretty straight forward process. Well anyway hope it works haha