Hi
I had the same problem and and kept me awake for two nights. Turns out, that I had installed wp super cache and modified wp-config.php to include the cache path.
Then one day, I switched the caching engine to Zencache or somethign else ( I was experimenting with cache engines LOL) and cleared the cache.
From that day onwards, I tried everything but login prompt would reappear when custmizing the theme…
Today, I analyzed the settings in wp-config.php and found the culprit.
// ** MySQL settings – You can get this info from your web host ** //
/** The name of the database for WordPress */
define( ‘WPCACHEHOME’, ‘C:\inetpub\xxxxxxxxxxx.com\wp-content\plugins\wp-super-cache/’ ); //Added by WP-Cache Manager
and commenting out this define fixed the issue.
New users coming to this page for solution:
Please note this worked because I was no longer using wp cache and had wpcachehome defined which was probably causing this conflict! You guys must try out the above steps first and see if it resolves the problem.
Thanks
