I'm getting 500 errors on some 404 requests. This is happening a lot when Google is trying to index pages that no longer exist, especially things like css files.
Here's an example URL that gives a 500: http://www.cocreationcoaching.org/wp-content/cache/autoptimize/css/autoptimize_1ba018ebe311d1d4b00d5b5d3151df33.css
I'm not sure what it is trying to redirect to, but I get the 500 errors, too many redirects. And in the error log it said too many internal redirects were attempted.
I just started multisite, so had to place the new code into .htaccess, so I don't know if that could be the cause somehow?