Trying to examine an AbuseLog entry made Oct 20 or prior displays no fields.
Example: examine 314933
Trying to get the details results in an error.
Example: details 314933
[f31cca8bf1ab5dc3fd3c70e7] /wiki/Special:AbuseLog/314933
AFPException from line 120 of /var/www/live/w/extensions/AbuseFilter/includes/parser/AFPData.php: Refusing to cast DUNDEFINED to something else
Backtrace:
#0 /var/www/live/w/extensions/AbuseFilter/includes/parser/AFPData.php(420): AFPData::castTypes(AFPData, string)
#1 /var/www/live/w/extensions/AbuseFilter/includes/special/SpecialAbuseLog.php(657): AFPData->toString()
#2 /var/www/live/w/extensions/AbuseFilter/includes/special/SpecialAbuseLog.php(129): SpecialAbuseLog->showDetails(string)
#3 /var/www/live/w/includes/specialpage/SpecialPage.php(575): SpecialAbuseLog->execute(string)
#4 /var/www/live/w/includes/specialpage/SpecialPageFactory.php(611): SpecialPage->run(string)
#5 /var/www/live/w/includes/MediaWiki.php(296): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#6 /var/www/live/w/includes/MediaWiki.php(854): MediaWiki->performRequest()
#7 /var/www/live/w/includes/MediaWiki.php(527): MediaWiki->main()
#8 /var/www/live/w/index.php(44): MediaWiki->run()
#9 {main}