Warning: Unsupported declare 'strict_types' in C:\xampp\htdocs\monitor\vendor\theseer\tokenizer\src\NamespaceUriException.php on line 1

Fatal error: Class 'TheSeer\Tokenizer\Exception' not found in C:\xampp\htdocs\monitor\vendor\theseer\tokenizer\src\NamespaceUriException.php on line 4