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Fatal error: Uncaught TypeError: array_flip(): Argument #1 ($array) must be of type array, null given in /var/www/html/repo/school-infix-v6.0/vendor/nikic/php-parser/grammar/rebuildParsers.php:22 Stack trace: #0 /var/www/html/repo/school-infix-v6.0/vendor/nikic/php-parser/grammar/rebuildParsers.php(22): array_flip(NULL) #1 {main} thrown in /var/www/html/repo/school-infix-v6.0/vendor/nikic/php-parser/grammar/rebuildParsers.php on line 22