Fatal error: OOUI\Exception: OOUI\Theme::singleton was called with no singleton theme set. in /var/wwwc/cathopedia.org/mediawiki-1.37.1/vendor/oojs/oojs-ui/php/Theme.php:31
Stack trace:
#0 /var/wwwc/cathopedia.org/mediawiki-1.37.1/vendor/oojs/oojs-ui/php/Element.php(256): OOUI\Theme::singleton()
#1 /var/wwwc/cathopedia.org/mediawiki-1.37.1/vendor/oojs/oojs-ui/php/Tag.php(494): OOUI\Element->toString()
#2 /var/wwwc/cathopedia.org/mediawiki-1.37.1/extensions.original/ConfirmEdit/SimpleCaptcha/SimpleCaptcha.php(150): OOUI\Tag->__toString()
#3 /var/wwwc/cathopedia.org/mediawiki-1.37.1/extensions.original/ContactPage/includes/SpecialContact.php(526): SimpleCaptcha->getFormInformation()
#4 /var/wwwc/cathopedia.org/mediawiki-1.37.1/extensions.original/ContactPage/includes/SpecialContact.php(206): SpecialContact->getCaptcha()
#5 /var/wwwc/cathopedia.org/mediawiki-1.37.1/includes/specialpage/SpecialPage.php(647): SpecialContact->execute()
#6 /var/wwwc/cathopedia.org/mediawiki-1.37.1/includes/specialpage/SpecialPageFactory.php(1366 in /var/wwwc/cathopedia.org/mediawiki-1.37.1/vendor/oojs/oojs-ui/php/Tag.php on line 496