Fatal error: OOUI\Exception: OOUI\Theme::singleton was called with no singleton theme set. in /home/burningjapan/www/wiki/vendor/oojs/oojs-ui/php/Theme.php:31
Stack trace:
#0 /home/burningjapan/www/wiki/vendor/oojs/oojs-ui/php/Element.php(259): OOUI\Theme::singleton()
#1 /home/burningjapan/www/wiki/vendor/oojs/oojs-ui/php/Tag.php(507): OOUI\Element->toString()
#2 /home/burningjapan/www/wiki/extensions/VisualEditor/includes/Hooks.php(244): OOUI\Tag->__toString()
#3 /home/burningjapan/www/wiki/includes/HookContainer/HookContainer.php(161): MediaWiki\Extension\VisualEditor\Hooks->onTextSlotDiffRendererTablePrefix(Object(TextSlotDiffRenderer), Object(DerivativeContext), Array)
#4 /home/burningjapan/www/wiki/includes/HookContainer/HookRunner.php(1334): MediaWiki\HookContainer\HookContainer->run('TextSlotDiffRen...', Array)
#5 /home/burningjapan/www/wiki/includes/diff/TextSlotDiffRenderer.php(273): MediaWiki\HookContainer\HookRunner->onTextSlotDiffRendererTablePrefix(Object(TextSlotDiffRenderer), Object(DerivativeContext), Arra in /home/burningjapan/www/wiki/vendor/oojs/oojs-ui/php/Tag.php on line 509