Try waiting a few minutes and reloading.
(Cannot access the database: Too many connections (localhost))
Backtrace:
#0 D:\wikis\wiki\includes\libs\rdbms\loadbalancer\LoadBalancer.php(897): Database->reportConnectionError('Unknown error (...') #1 D:\wikis\wiki\includes\libs\rdbms\loadbalancer\LoadBalancer.php(572): LoadBalancer->reportConnectionError() #2 D:\wikis\wiki\includes\GlobalFunctions.php(3075): LoadBalancer->getConnection(-1, Array, false) #3 D:\wikis\wiki\includes\Revision.php(322): wfGetDB(-1) #4 D:\wikis\wiki\includes\Revision.php(111): Revision::newFromConds(Array, 0) #5 D:\wikis\wiki\includes\MediaWiki.php(105): Revision::newFromId(1764) #6 D:\wikis\wiki\includes\MediaWiki.php(136): MediaWiki->parseTitle() #7 D:\wikis\wiki\includes\MediaWiki.php(766): MediaWiki->getTitle() #8 D:\wikis\wiki\includes\MediaWiki.php(512): MediaWiki->main() #9 D:\wikis\wiki\index.php(43): MediaWiki->run() #10 {main}