I have this issue, where I can't access the frontend without a blank page anymore. It drives me crazy.
The backend seems to be up just fine, but the frontend is white. When trying to chose another theme (twentyten) this one also returns white, already in the preview.
I've turned on debug in wp-config after following another thread and it has come up with the following errors:
Warning: include_once(/home/dali/public_html/wilds/wp-content/plugins/wp-super-cache/wp-cache-phase1.php): failed to open stream: Permission denied in /home/wildsofo/public_html/wp-content/advanced-cache.php on line 14
Warning: include_once(): Failed opening '/home/dali/public_html/wilds/wp-content/plugins/wp-super-cache/wp-cache-phase1.php' for inclusion (include_path='.:/opt/php54/lib/php') in /home/wildsofo/public_html/wp-content/advanced-cache.php on line 14
What can I possibly do?