Your error specifically mentions WP Super Cache, so it’s definitely something to do with that plugin. With caching plugins (especially that one), deactivating it doesn’t always delete the cache. I don’t know much about it, which is why I suggested checking with their support, as they might have ran into the same issue before.
I am good in PHP. Need help
Problem not gone
Warning: Cannot modify header information – headers already sent by (output started at /home/thesemen/public_html/site.com/index.php:1) in /home/………/wp-includes/pluggable.php on line 1210
line 1210 header(“Location: $location”, true, $status);
That’s typically an issue with a plugin. Have you tried deactivating your plugins? If you don’t have access to your Dashboard, rename the plugins folder on your server to plugins1 and then log in. Then rename it back to plugins and activate your plugins one by one until the problem appears again.