Try waiting a few minutes and reloading.
(Cannot access the database: Too many connections (wiki.cwh621jgfadf.us-east-1.rds.amazonaws.com))
Backtrace:
#0 /var/www/html/includes/libs/rdbms/loadbalancer/LoadBalancer.php(995): Wikimedia\Rdbms\Database->reportConnectionError('Unknown error (...') #1 /var/www/html/includes/libs/rdbms/loadbalancer/LoadBalancer.php(666): Wikimedia\Rdbms\LoadBalancer->reportConnectionError() #2 /var/www/html/includes/GlobalFunctions.php(3062): Wikimedia\Rdbms\LoadBalancer->getConnection(-1, Array, false) #3 /var/www/html/includes/page/WikiPage.php(384): wfGetDB(-1) #4 /var/www/html/includes/page/WikiPage.php(467): WikiPage->loadPageData() #5 /var/www/html/includes/page/WikiPage.php(508): WikiPage->exists() #6 /var/www/html/includes/page/WikiPage.php(230): WikiPage->getContentModel() #7 /var/www/html/includes/page/WikiPage.php(217): WikiPage->getContentHandler() #8 /var/www/html/includes/actions/Action.php(96): WikiPage->getActionOverrides() #9 /var/www/html/includes/actions/Action.php(154): Action::factory('view', Object(WikiPage), Object(RequestContext)) #10 /var/www/html/includes/MediaWiki.php(155): Action::getActionName(Object(RequestContext)) #11 /var/www/html/includes/MediaWiki.php(778): MediaWiki->getAction() #12 /var/www/html/includes/MediaWiki.php(523): MediaWiki->main() #13 /var/www/html/index.php(43): MediaWiki->run() #14 {main}