Unbeatable Tic-Tac-Toe

New Game
Player 2 Wins
X X
O O O
X

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Fatal error: Uncaught Error: Call to a member function getElementsByTagName() on null in /usr/local/www/apache24/data/tictactoe/index.php:38 Stack trace: #0 /usr/local/www/apache24/data/tictactoe/index.php(113): update_element('t10380', 'moves', '_XXOOO__X') #1 /usr/local/www/apache24/data/tictactoe/index.php(334): generate('_XXOOO__X', 't10380') #2 {main} thrown in /usr/local/www/apache24/data/tictactoe/index.php on line 38