Internal Server Error

[2fb6c2b16f3bc424e788aa03] /api.php?action=feedcontributions&user=MaddLoc&feedformat=atom Wikimedia\Rdbms\DBConnectionError from line 1213 of /var/www/www.rapdict.org/mediawiki-1.33.0/includes/libs/rdbms/loadbalancer/LoadBalancer.php: Cannot access the database: Unknown error (localhost)
Backtrace:
#0 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/libs/rdbms/loadbalancer/LoadBalancer.php(758): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/GlobalFunctions.php(2637): Wikimedia\Rdbms\LoadBalancer->getConnection()
#2 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/localisation/LCStoreDB.php(54): wfGetDB()
#3 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/localisation/LocalisationCache.php(410): LCStoreDB->get()
#4 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/localisation/LocalisationCache.php(456): LocalisationCache->isExpired()
#5 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/localisation/LocalisationCache.php(375): LocalisationCache->initLanguage()
#6 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/localisation/LocalisationCache.php(294): LocalisationCache->loadSubitem()
#7 /var/www/www.rapdict.org/mediawiki-1.33.0/languages/Language.php(2645): LocalisationCache->getSubitem()
#8 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/MessageCache.php(990): Language->getMessage()
#9 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/MessageCache.php(948): MessageCache->getMessageForLang()
#10 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/cache/MessageCache.php(890): MessageCache->getMessageFromFallbackChain()
#11 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/Message.php(1308): MessageCache->get()
#12 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/Message.php(863): Message->fetchMessage()
#13 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/Message.php(955): Message->toString()
#14 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiErrorFormatter.php(454): Message->text()
#15 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiErrorFormatter.php(148): ApiErrorFormatter_BackCompat->addWarningOrError()
#16 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiMain.php(1096): ApiErrorFormatter->addError()
#17 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiMain.php(581): ApiMain->substituteResultWithError()
#18 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiMain.php(538): ApiMain->handleException()
#19 /var/www/www.rapdict.org/mediawiki-1.33.0/includes/api/ApiMain.php(502): ApiMain->executeActionWithErrorHandling()
#20 /var/www/www.rapdict.org/mediawiki-1.33.0/api.php(87): ApiMain->execute()
#21 {main}