Internal error

[d3f99b0e413dd4166b4fd113] /w/index.php?title=Special:FormulaInfo&pid=633&eid=math.633.10 RuntimeException: math.633.10 not found in revision text 633

Backtrace:

from /var/www/html/extensions/MathSearch/includes/MathObject.php(124)
#0 /var/www/html/extensions/MathSearch/includes/FormulaInfo.php(146): MathObject::newFromRevisionText(integer, string)
#1 /var/www/html/extensions/MathSearch/includes/FormulaInfo.php(45): FormulaInfo->DisplayInfo(integer, string)
#2 /var/www/html/includes/specialpage/SpecialPage.php(718): FormulaInfo->execute(NULL)
#3 /var/www/html/includes/specialpage/SpecialPageFactory.php(1669): MediaWiki\SpecialPage\SpecialPage->run(NULL)
#4 /var/www/html/includes/actions/ActionEntryPoint.php(504): MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
#5 /var/www/html/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#6 /var/www/html/includes/MediaWikiEntryPoint.php(199): MediaWiki\Actions\ActionEntryPoint->execute()
#7 /var/www/html/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#8 {main}