'Fatal error' when try to log in web email via Cpanel

Hi guys, so my problem this time is with the webmail. When I try to login to the email via Cpanel it gives me an error: A fatal error or timeout occurred while processing this directive Template::Exception: [TYPE]=[undef] [INFO]=[Voc"" n""o tem um usu""rio chamado user@mydomain.com.br". at /usr/local/cpanel/Cpanel/API.pm line 282. ] [TEXT]=[] at cpanel.pl line 1128. cpanel::cpanel::cptt_exectag("/usr/local/cpanel/base/frontend/paper_lantern/mail/webmailfor"..., 1) called at cpanel.pl line 4634 cpanel::cpanel::run_standard_mode() called at cpanel.pl line 932 cpanel::cpanel::script("cpanel::cpanel", "./frontend/paper_lantern/mail/webmailform.html.tt") called at cpanel.pl line 328
But when I try to login directly via webmail (www.mydomain.com.br:2096) I can log in normally. I searched but didn't find someone with a problem in the email, just in the hole Cpanel. What is this error?