Lab Coat doesn't accept glpat- style personal access tokens

I am generating a personal access token with my self-hosted GL CE instance. The token format seems to be ^glpat-[a-zA-Z0-9_-]*\.[0-9]*\.[a-zA-Z0-9]*$. If I try to this token, I get a Not a valid private token error on the login page.

I suspect it's a format check because if I just take the ^[a-zA-Z0-9_-]*$ part then the app tries to log in (and fails because the token is incorrect).