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Fatal error: require(): Failed opening required '//wp-includes/html-api/class-wp-html-unsupported-exception.php' (include_path='.:/:/usr/local/php74/lib/pear') in /wp-settings.php on line 242

Fatal error: Uncaught Error: Call to a member function set() on null in /wp-includes/l10n.php:806 Stack trace: #0 /wp-includes/l10n.php(900): load_textdomain('default', '//wp-content/la...', 'pl_PL') #1 /wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain() #2 [internal function]: WP_Fatal_Error_Handler->handle() #3 {main} thrown in /wp-includes/l10n.php on line 806