UVA的remotejudge

Argument 1 passed to Luogu\Library\Document\DoubleLayerEncryptionHelper::__construct() must be of the type string, null given, called in 
/app/source/src/Library/Judge/Judger/RemoteJudgeJudger.php on line 118

交不起来，不过单看这段话貌似不像网络错误