When I want reset my password on my forums nothing happens.
I see just the blue loading icon. But I have an error message, from this file:

/index.php?u=/Ajax/user/login/req_pass&ident=Username&token=Tokennumber

Notice: Undefined offset: 1 in /home/www/xxx/forum/sys/Controller/Ajax/user/login.php on line 103
{"status":"success","msg":"E-mail sent successfully"}

Never changed something in this file.

Thats strange.

Can you copy paste the token from the token column of that user in the users table ?

@admin
It works now, I deleted the password and the token with phpMyAdmin inside the user table. It was strange because the forget function was working fine with fresh accounts.