Login Issue

I've been receiving the following when trying to log into the website: Warning: Cannot modify header information - headers already sent by (output started at /home/u00196ae/public_html/wp-content/themes/simple-catch-pro/functions/simplecatch_functions.php:422) in /home/u00196ae/public_html/wp-login.php on line 431 Warning: Cannot modify header information - headers already sent by (output started at /home/u00196ae/public_html/wp-content/themes/simple-catch-pro/functions/simplecatch_functions.php:422) in /home/u00196ae/public_html/wp-login.php on line 444 My website is www.relam.ca Could somebody advise on how to fix this?