PHP Fatal error:  Uncaught TypeError: Unsupported operand types: phpbb\request\deactivated_super_global + phpbb\request\deactivated_super_global in [ROOT]\phpbb\request\request.php:78

Stack trace:

#0 [ROOT]\install\startup.php(180): phpbb\request\request->__construct(Object(phpbb\request\type_cast_helper))

#1 [internal function]: installer_shutdown_function(1)

#2 {main}

  thrown in [ROOT]\phpbb\request\request.php on line 78

$this->input[\phpbb\request\request_interface::REQUEST] = $this->input[\phpbb\request\request_interface::POST] + $this->input[\phpbb\request\request_interface::GET];