Warning: Unsupported declare 'strict_types' in C:\Apache24\htdocs\zz_drupal\vendor\revolt\event-loop\src\EventLoop\InvalidCallbackError.php on line 3

Parse error: syntax error, unexpected 'const' (T_CONST), expecting variable (T_VARIABLE) in C:\Apache24\htdocs\zz_drupal\vendor\revolt\event-loop\src\EventLoop\InvalidCallbackError.php on line 11