How to track down why I cannot log in on a local environment with Libmemcached?
I decided to match a local MAMP environment with the live production site.
1. Matched database name, username and password
2. Installed Homebrew
3. Installed memcached.so for PHP 7
4. Restarted MAMP
Once this was configured the WordPress side loaded fine but the XenForo side tossed errors for Undefined index, etc. These were all from my plugin, which I fixed immediately. Yay.
After my fixes, the sites are loading but I cannot log into XenForo. No errors are in the error logs.
My assumption is that this is due to cache. This is in the config.php