The real error is the first one:
Warning: Missing argument 6 for WA_SecurityAssist_Definition(), called in /home/nigmaage/public_html/cliente/soccerland/admin/recuperar-password.php on line 75 and defined in /home/nigmaage/public_html/cliente/soccerland/webassist/security_assist/mail_php.php on line 34
The other errors only happen as a result of the first error. To debug the first error I'd like to see the two files mentioned in the error:
If you can zip and attach a copy of those two files I should be able to give you instructions on how to correct the problem.
Do you have an older version of Universal Email installed (pre v4)? That could be the cause of the issue, but if you send me those two files I'll figure out how to correct it.