Login

I recently updated a few plugins, and now I cannot login to my wordpress site that runs on godaddy. This is the message I receive:

Warning: Cannot modify header information – headers already sent by (output started at /home/content/76/7856176/html/wp-content/mu-plugins/ssl_module.php:17) in /home/content/76/7856176/html/wp-includes/pluggable.php on line 896

How can I correct this? I appreciate any help that you can give me.
Sherry