GetChallenge: Packet header mismatch. (0x6d)

#0 /var/www/html/ServerSignature/SourceQuery/SourceQuery.php(383): xPaw\SourceQuery\SourceQuery->GetChallenge()
#1 /var/www/html/ServerSignature/browser/index.php(81): xPaw\SourceQuery\SourceQuery->GetPlayers()
#2 {main}