>>865
PHP Fatal error: Uncaught Error: Call to a member function getCode() on null in /usr/share/mediawiki/includes/user/User.php:1737\n
Stack trace:\n#0 /usr/share/mediawiki/includes/user/User.php(5412): User::getDefaultOptions()\n#1
/usr/share/mediawiki/includes/user/User.php(539): User->loadOptions()\n#2
/usr/share/mediawiki/includes/libs/objectcache/WANObjectCache.php(1092): User->{closure}(false, 3600, Array, NULL)\n#3
/usr/share/mediawiki/includes/libs/objectcache/WANObjectCache.php(1240): WANObjectCache->{closure}(false, 3600, Array, NULL)\n#4
/usr/share/mediawiki/includes/libs/objectcache/WANObjectCache.php(1097): WANObjectCache->doGetWithSetCallback('global:user:id:...', 3600, Object(Closure), Array, NULL)\n#5
/usr/share/mediawiki/includes/user/User.php(561): WANObjectCache->getWithSetCallback('global:user:id:...', 3600, Object(Closure), Array)\n#6
/usr/share/mediawiki/includes/user/User.php(482): User->loadFromCache()\n#7
/usr/share/mediawiki/includes/user/User.php(420): User->loadFromId(0)\n#8
/usr/share/mediawiki/includes/session/ in /usr/share/mediawiki/includes/user/User.php on line 1737

＞MediaWikiはまだPHP 7.3との完全な互換性はありません。

死んだ　orz