Thread:Project:Support desk/Fatal exception of type MWException after upgrade to MW from 1.19 to 1.20/reply (9)

This seems to be MemCache issue for me. So I commented out the lines in the LocalSettings.php:

$wgMainCacheType = CACHE_MEMCACHED; $wgMemCachedServers = array( '127.0.0.1:11211' );

And it worked for me. Hence, I guess you'll have to check Memcache settings and whether it's installed on your server.

Hope this helps.

Thanks Waqar / 4 Ace Technologies - bringing your ideas to reality!