Steps to reproduce:
Error message:
[V4YAOApEEH8AAEnhYz0AAAAM] /wiki/Special:CreateAccount UnderflowException from line 412 of /srv/mediawiki/php-master/extensions/ConfirmEdit/FancyCaptcha/FancyCaptcha.class.php: Ran out of captcha images
Backtrace:
#0 /srv/mediawiki/php-master/extensions/ConfirmEdit/SimpleCaptcha/Captcha.php(1296): FancyCaptcha->getCaptcha()
#1 /srv/mediawiki/php-master/extensions/ConfirmEdit/includes/auth/CaptchaPreAuthenticationProvider.php(60): SimpleCaptcha->createAuthenticationRequest()
#2 /srv/mediawiki/php-master/includes/auth/AuthManager.php(2035): CaptchaPreAuthenticationProvider->getAuthenticationRequests(string, array)
#3 /srv/mediawiki/php-master/includes/auth/AuthManager.php(2011): MediaWiki\Auth\AuthManager->getAuthenticationRequestsInternal(string, array, array, User)
#4 /srv/mediawiki/php-master/includes/specialpage/AuthManagerSpecialPage.php(257): MediaWiki\Auth\AuthManager->getAuthenticationRequests(string, User)
#5 /srv/mediawiki/php-master/includes/specialpage/LoginSignupSpecialPage.php(143): AuthManagerSpecialPage->loadAuth(NULL)
#6 /srv/mediawiki/php-master/includes/specialpage/LoginSignupSpecialPage.php(222): LoginSignupSpecialPage->load(NULL)
#7 /srv/mediawiki/php-master/includes/specialpage/SpecialPage.php(505): LoginSignupSpecialPage->execute(NULL)
#8 /srv/mediawiki/php-master/includes/specialpage/SpecialPageFactory.php(598): SpecialPage->run(NULL)
#9 /srv/mediawiki/php-master/includes/MediaWiki.php(282): SpecialPageFactory::executePath(Title, RequestContext)
#10 /srv/mediawiki/php-master/includes/MediaWiki.php(748): MediaWiki->performRequest()
#11 /srv/mediawiki/php-master/includes/MediaWiki.php(520): MediaWiki->main()
#12 /srv/mediawiki/php-master/index.php(43): MediaWiki->run()
#13 /srv/mediawiki/w/index.php(3): include(string)
#14 {main}