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Backtrace:

#0 /var/www/worldafropedia.com/html/wiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(934): Wikimedia\Rdbms\LoadBalancer->reportConnectionError()
#1 /var/www/worldafropedia.com/html/wiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(901): Wikimedia\Rdbms\LoadBalancer->getServerConnection(0, 'worldafropedia', 0)
#2 /var/www/worldafropedia.com/html/wiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1046): Wikimedia\Rdbms\LoadBalancer->getConnection(-1, Array, 'worldafropedia', 0)
#3 /var/www/worldafropedia.com/html/wiki/includes/GlobalFunctions.php(2469): Wikimedia\Rdbms\LoadBalancer->getMaintenanceConnectionRef(-1, Array, 'worldafropedia')
#4 /var/www/worldafropedia.com/html/wiki/includes/cache/localisation/LCStoreDB.php(56): wfGetDB(-1)
#5 /var/www/worldafropedia.com/html/wiki/includes/cache/localisation/LocalisationCache.php(449): LCStoreDB->get('en', 'deps')
#6 /var/www/worldafropedia.com/html/wiki/includes/cache/localisation/LocalisationCache.php(495): LocalisationCache->isExpired('en')
#7 /var/www/worldafropedia.com/html/wiki/includes/cache/localisation/LocalisationCache.php(414): LocalisationCache->initLanguage('en')
#8 /var/www/worldafropedia.com/html/wiki/includes/cache/localisation/LocalisationCache.php(333): LocalisationCache->loadSubitem('en', 'messages', 'apierror-except...')
#9 /var/www/worldafropedia.com/html/wiki/languages/Language.php(2645): LocalisationCache->getSubitem('en', 'messages', 'apierror-except...')
#10 /var/www/worldafropedia.com/html/wiki/includes/cache/MessageCache.php(1030): Language->getMessage('apierror-except...')
#11 /var/www/worldafropedia.com/html/wiki/includes/cache/MessageCache.php(988): MessageCache->getMessageForLang(Object(LanguageEn), 'apierror-except...', false, Array)
#12 /var/www/worldafropedia.com/html/wiki/includes/cache/MessageCache.php(930): MessageCache->getMessageFromFallbackChain(Object(LanguageEn), 'apierror-except...', false)
#13 /var/www/worldafropedia.com/html/wiki/includes/language/Message.php(1304): MessageCache->get('apierror-except...', false, Object(LanguageEn))
#14 /var/www/worldafropedia.com/html/wiki/includes/language/Message.php(862): Message->fetchMessage()
#15 /var/www/worldafropedia.com/html/wiki/includes/language/Message.php(954): Message->toString('text')
#16 /var/www/worldafropedia.com/html/wiki/includes/api/ApiErrorFormatter_BackCompat.php(90): Message->text()
#17 /var/www/worldafropedia.com/html/wiki/includes/api/ApiErrorFormatter.php(149): ApiErrorFormatter_BackCompat->addWarningOrError('error', NULL, Object(ApiMessage))
#18 /var/www/worldafropedia.com/html/wiki/includes/api/ApiMain.php(1080): ApiErrorFormatter->addError(NULL, Object(ApiMessage))
#19 /var/www/worldafropedia.com/html/wiki/includes/api/ApiMain.php(591): ApiMain->substituteResultWithError(Object(Wikimedia\Rdbms\DBConnectionError))
#20 /var/www/worldafropedia.com/html/wiki/includes/api/ApiMain.php(536): ApiMain->handleException(Object(Wikimedia\Rdbms\DBConnectionError))
#21 /var/www/worldafropedia.com/html/wiki/includes/api/ApiMain.php(500): ApiMain->executeActionWithErrorHandling()
#22 /var/www/worldafropedia.com/html/wiki/api.php(90): ApiMain->execute()
#23 /var/www/worldafropedia.com/html/wiki/api.php(45): wfApiMain()
#24 {main}