Warning: Cannot modify header information – headers already sent by

Below is what pops up on my page when I try to login or even to view my website.

Warning: Cannot modify header information – headers already sent by (output started at /home2/inwildre/public_html/wp-content/themes/clean-blogging/inc/customizer.php:9) in /home2/inwildre/public_html/wp-includes/pluggable.php on line 1219

I have attempted to rid any extra white spaces as directed by the forums – with no success. I would like to change the theme of my website, at least to keep it up and running. Not sure what else to try, as I can’t login in to actually change the theme.

• This topic was modified 6 years, 3 months ago by Steven Stern (sterndata).

The page I need help with: [log in to see the link]