This is the full message of what happened when I got Error 1146. The URL is: "http://objectshowpedia.com".
"Error 1146: Table 'vellewmy_objectshowpedia.objectshowpediaecho_event' doesn't exist
Function: MediaWiki\Extension\Notifications\Mapper\EventMapper::fetchUnreadByUserAndPage
Query: SELECT event_id,event_type,event_variant,event_agent_id,event_agent_ip,event_extra,event_page_id,event_deleted,notification_timestamp FROM `objectshowpediaecho_event` JOIN `objectshowpediaecho_notification` ON ((notification_event=event_id)) JOIN `objectshowpediaecho_target_page` ON ((etp_event=event_id)) WHERE event_deleted = 0 AND notification_user = 1 AND notification_read_timestamp IS NULL AND etp_page = 1
Backtrace:
from /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1203)
#0 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1187): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1161): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(652): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1350): Wikimedia\Rdbms\Database->query(Wikimedia\Rdbms\Query, string)
#4 /home1/vellewmy/public_html/includes/libs/rdbms/database/DBConnRef.php(119): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#5 /home1/vellewmy/public_html/includes/libs/rdbms/database/DBConnRef.php(351): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /home1/vellewmy/public_html/extensions/Echo/includes/Mapper/EventMapper.php(160): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#7 /home1/vellewmy/public_html/extensions/Echo/includes/Hooks.php(872): MediaWiki\Extension\Notifications\Mapper\EventMapper->fetchUnreadByUserAndPage(MediaWiki\User\User, integer)
#8 /home1/vellewmy/public_html/extensions/Echo/includes/Hooks.php(972): MediaWiki\Extension\Notifications\Hooks->processMarkAsRead(MediaWiki\User\User, MediaWiki\Request\WebRequest, MediaWiki\Title\Title)
#9 /home1/vellewmy/public_html/includes/HookContainer/HookContainer.php(159): MediaWiki\Extension\Notifications\Hooks->onSkinTemplateNavigation__Universal(MediaWiki\Skin\Timeless\SkinTimeless, array)
#10 /home1/vellewmy/public_html/includes/HookContainer/HookRunner.php(3581): MediaWiki\HookContainer\HookContainer->run(string, array, array)
#11 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(964): MediaWiki\HookContainer\HookRunner->onSkinTemplateNavigation__Universal(MediaWiki\Skin\Timeless\SkinTimeless, array)
#12 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(1357): SkinTemplate->runOnSkinTemplateNavigationHooks(MediaWiki\Skin\Timeless\SkinTimeless, array)
#13 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(607): SkinTemplate->buildContentNavigationUrlsInternal()
#14 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(594): SkinTemplate->getPortletsTemplateData()
#15 /home1/vellewmy/public_html/includes/skins/Skin.php(766): SkinTemplate->getCategoryLinks()
#16 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(212): Skin->getCategories()
#17 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(145): SkinTemplate->prepareQuickTemplate()
#18 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(176): SkinTemplate->generateHTML()
#19 /home1/vellewmy/public_html/includes/Output/OutputPage.php(3004): SkinTemplate->outputPage()
#20 /home1/vellewmy/public_html/includes/actions/ActionEntryPoint.php(162): MediaWiki\Output\OutputPage->output(boolean)
#21 /home1/vellewmy/public_html/includes/MediaWikiEntryPoint.php(199): MediaWiki\Actions\ActionEntryPoint->execute()
#22 /home1/vellewmy/public_html/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#23 {main}
Exception caught inside exception handler: [ZtTf-OMQz6Kc9GkW1PdExwAAAgk] /index.php/Main_Page Wikimedia\Rdbms\DBQueryError: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading or after adding a new extension?
Please see https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Upgrading and https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:How_to_debug for more information.
Error 1146: Table 'vellewmy_objectshowpedia.objectshowpediaecho_event' doesn't exist
Function: MediaWiki\Extension\Notifications\Mapper\EventMapper::fetchUnreadByUserAndPage
Query: SELECT event_id,event_type,event_variant,event_agent_id,event_agent_ip,event_extra,event_page_id,event_deleted,notification_timestamp FROM `objectshowpediaecho_event` JOIN `objectshowpediaecho_notification` ON ((notification_event=event_id)) JOIN `objectshowpediaecho_target_page` ON ((etp_event=event_id)) WHERE event_deleted = 0 AND notification_user = 1 AND notification_read_timestamp IS NULL AND etp_page = 1
Backtrace:
from /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1203)
#0 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1187): Wikimedia\Rdbms\Database->getQueryException(string, integer, string, string)
#1 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1161): Wikimedia\Rdbms\Database->getQueryExceptionAndLog(string, integer, string, string)
#2 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(652): Wikimedia\Rdbms\Database->reportQueryError(string, integer, string, string, boolean)
#3 /home1/vellewmy/public_html/includes/libs/rdbms/database/Database.php(1350): Wikimedia\Rdbms\Database->query(Wikimedia\Rdbms\Query, string)
#4 /home1/vellewmy/public_html/includes/libs/rdbms/database/DBConnRef.php(119): Wikimedia\Rdbms\Database->select(array, array, array, string, array, array)
#5 /home1/vellewmy/public_html/includes/libs/rdbms/database/DBConnRef.php(351): Wikimedia\Rdbms\DBConnRef->__call(string, array)
#6 /home1/vellewmy/public_html/extensions/Echo/includes/Mapper/EventMapper.php(160): Wikimedia\Rdbms\DBConnRef->select(array, array, array, string, array, array)
#7 /home1/vellewmy/public_html/extensions/Echo/includes/Hooks.php(872): MediaWiki\Extension\Notifications\Mapper\EventMapper->fetchUnreadByUserAndPage(MediaWiki\User\User, integer)
#8 /home1/vellewmy/public_html/extensions/Echo/includes/Hooks.php(972): MediaWiki\Extension\Notifications\Hooks->processMarkAsRead(MediaWiki\User\User, MediaWiki\Request\WebRequest, MediaWiki\Title\Title)
#9 /home1/vellewmy/public_html/includes/HookContainer/HookContainer.php(159): MediaWiki\Extension\Notifications\Hooks->onSkinTemplateNavigation__Universal(MediaWiki\Skin\Timeless\SkinTimeless, array)
#10 /home1/vellewmy/public_html/includes/HookContainer/HookRunner.php(3581): MediaWiki\HookContainer\HookContainer->run(string, array, array)
#11 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(964): MediaWiki\HookContainer\HookRunner->onSkinTemplateNavigation__Universal(MediaWiki\Skin\Timeless\SkinTimeless, array)
#12 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(1357): SkinTemplate->runOnSkinTemplateNavigationHooks(MediaWiki\Skin\Timeless\SkinTimeless, array)
#13 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(607): SkinTemplate->buildContentNavigationUrlsInternal()
#14 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(594): SkinTemplate->getPortletsTemplateData()
#15 /home1/vellewmy/public_html/includes/skins/Skin.php(766): SkinTemplate->getCategoryLinks()
#16 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(212): Skin->getCategories()
#17 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(145): SkinTemplate->prepareQuickTemplate()
#18 /home1/vellewmy/public_html/includes/skins/SkinTemplate.php(176): SkinTemplate->generateHTML()
#19 /home1/vellewmy/public_html/includes/Output/OutputPage.php(3004): SkinTemplate->outputPage()
#20 /home1/vellewmy/public_html/includes/exception/MWExceptionRenderer.php(189): MediaWiki\Output\OutputPage->output()
#21 /home1/vellewmy/public_html/includes/exception/MWExceptionRenderer.php(106): MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBQueryError)
#22 /home1/vellewmy/public_html/includes/exception/MWExceptionHandler.php(133): MWExceptionRenderer::output(Wikimedia\Rdbms\DBQueryError, integer)
#23 /home1/vellewmy/public_html/includes/exception/MWExceptionHandler.php(237): MWExceptionHandler::report(Wikimedia\Rdbms\DBQueryError)
#24 /home1/vellewmy/public_html/includes/MediaWikiEntryPoint.php(221): MWExceptionHandler::handleException(Wikimedia\Rdbms\DBQueryError, string)
#25 /home1/vellewmy/public_html/includes/actions/ActionEntryPoint.php(82): MediaWiki\MediaWikiEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryError)
#26 /home1/vellewmy/public_html/includes/MediaWikiEntryPoint.php(205): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError(Wikimedia\Rdbms\DBQueryError)
#27 /home1/vellewmy/public_html/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#28 {main}"
Does somebody know how to fix it? If it was an extension that broke the wiki, I don't know which one.