Internal error

From MicrobeWiki, the student-edited microbiology resource

[32da88d202fcfba3d594402b] /index.php?title=Rhodotorula_glutinis&action=info InvalidArgumentException: Actor name can not be empty for 0 and 3962

Backtrace:

from /var/lib/mediawiki/includes/user/ActorStore.php(168)
#0 /var/lib/mediawiki/includes/Revision/RevisionStore.php(1801): MediaWiki\User\ActorStore->newActorFromRowFields()
#1 [internal function]: MediaWiki\Revision\RevisionStore->MediaWiki\Revision\{closure}()
#2 /var/lib/mediawiki/includes/Revision/RevisionStoreCacheRecord.php(104): call_user_func()
#3 /var/lib/mediawiki/includes/Revision/RevisionStoreCacheRecord.php(93): MediaWiki\Revision\RevisionStoreCacheRecord->loadFreshRow()
#4 /var/lib/mediawiki/includes/actions/InfoAction.php(702): MediaWiki\Revision\RevisionStoreCacheRecord->getUser()
#5 /var/lib/mediawiki/includes/actions/InfoAction.php(242): InfoAction->pageInfo()
#6 /var/lib/mediawiki/includes/actions/FormlessAction.php(48): InfoAction->onView()
#7 /var/lib/mediawiki/includes/MediaWiki.php(542): FormlessAction->show()
#8 /var/lib/mediawiki/includes/MediaWiki.php(322): MediaWiki->performAction()
#9 /var/lib/mediawiki/includes/MediaWiki.php(904): MediaWiki->performRequest()
#10 /var/lib/mediawiki/includes/MediaWiki.php(562): MediaWiki->main()
#11 /var/lib/mediawiki/index.php(50): MediaWiki->run()
#12 /var/lib/mediawiki/index.php(46): wfIndexMain()
#13 {main}