Hi, so my client is using repeater on his house, and encountered this error, it can be solved by using the trial mode first and then login.
I googled this problem, and then found a solution, by enabling the HTTP PAP on the server profile . I tried it, but after i login it says Invalid password, and the login page changed to white background, i keep repeating it, but it doesn't do anything.
Can someone help me?

Its most probably that repeater messing around with the authentication method breaking it.

Maybe check on the repeater if there is something like use radius authentication enabled.