This is a bug that I have logged in our system, we will have it corrected in the next update, I will let you know when that becomes available.
the headers already sent error means there is out put to the page before the code to redirect.
the error says the problem is at line 136:
output started at /home3/username/public_html/client-access/forgotpassword.php:136
send a copy of the page please.