Can not play my alt if I copy my UI over.

I have been able to copy my UI by moving over my dat files in my character folders, but now I get a 90002/10105 error if I attempt to do so. If I delete my CHR folder for my alt i can log on just fine, this has never been an issue in the past and I really do not want to replicate my and settings all over again. This has happened on 2 separate pcs also. I am just wondering if other people have been having the same issue or if i just need to suck it up and try to copy my UI?

I don't know what the problem is, but are you copying over all the files?

If so just trying copying over hotbar.dat and uisave.dat and nothing else. I believe those are the only ones you'll need (for hotbar config and UI layout)