...I'm starting to think that there's something wrong with my Metamask wallet.
I don't think so. The error is more likely in the code of that token which is exactly what it says. You should be asking the team behind that project to look into it and try to contact Metamask.
That's more likely the issue I have two tokens that are locked and that's the message that pops up, it's not the wallet because if it's the wallet all tokens will show the same issue, but if it's only one particular token it is on the code of the token, it's likely that the token is locked and it cannot be transferred unless the developer of the token unlock it.