Internal error
[7321349541b80f36d50da896] /wiki/Newsletter:Administrators%27_newsletter MediaWiki\Exception\MWContentSerializationException: The Newsletter content is invalid.
Backtrace:
from /var/www/html/extensions/Newsletter/includes/Content/NewsletterContentHandler.php(71)
#0 /var/www/html/includes/Revision/RevisionStore.php(1187): MediaWiki\Extension\Newsletter\Content\NewsletterContentHandler->unserializeContent()
#1 /var/www/html/includes/Revision/RevisionStore.php(1460): MediaWiki\Revision\RevisionStore->loadSlotContent()
#2 /var/www/html/includes/Revision/SlotRecord.php(307): MediaWiki\Revision\RevisionStore->{closure:MediaWiki\Revision\RevisionStore::constructSlotRecords():1452}()
#3 /var/www/html/includes/Revision/RevisionRecord.php(207): MediaWiki\Revision\SlotRecord->getContent()
#4 /var/www/html/includes/Revision/RenderedRevision.php(216): MediaWiki\Revision\RevisionRecord->getContentOrThrow()
#5 /var/www/html/includes/Revision/RevisionRenderer.php(225): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#6 /var/www/html/includes/Revision/RevisionRenderer.php(158): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#7 /var/www/html/includes/Revision/RenderedRevision.php(182): MediaWiki\Revision\RevisionRenderer->{closure:MediaWiki\Revision\RevisionRenderer::getRenderedRevision():156}()
#8 /var/www/html/includes/page/ParserOutputAccess.php(586): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#9 /var/www/html/includes/page/ParserOutputAccess.php(672): MediaWiki\Page\ParserOutputAccess->renderRevision()
#10 /var/www/html/includes/poolcounter/PoolCounterWorkViaCallback.php(68): MediaWiki\Page\ParserOutputAccess->{closure:MediaWiki\Page\ParserOutputAccess::newPoolWork():671}()
#11 /var/www/html/includes/poolcounter/PoolCounterWork.php(159): MediaWiki\PoolCounter\PoolCounterWorkViaCallback->doWork()
#12 /var/www/html/includes/page/ParserOutputAccess.php(489): MediaWiki\PoolCounter\PoolCounterWork->execute()
#13 /var/www/html/includes/page/Article.php(824): MediaWiki\Page\ParserOutputAccess->getParserOutput()
#14 /var/www/html/includes/page/Article.php(537): MediaWiki\Page\Article->generateContentOutput()
#15 /var/www/html/includes/actions/ViewAction.php(71): MediaWiki\Page\Article->view()
#16 /var/www/html/includes/actions/ActionEntryPoint.php(734): MediaWiki\Actions\ViewAction->show()
#17 /var/www/html/includes/actions/ActionEntryPoint.php(505): MediaWiki\Actions\ActionEntryPoint->performAction()
#18 /var/www/html/includes/actions/ActionEntryPoint.php(143): MediaWiki\Actions\ActionEntryPoint->performRequest()
#19 /var/www/html/includes/MediaWikiEntryPoint.php(184): MediaWiki\Actions\ActionEntryPoint->execute()
#20 /var/www/html/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#21 {main}