Fatal error: Uncaught Error: Interface 'Psr\Http\Message\StreamInterface' not found in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\psr7\src\FnStream.php:15
Stack trace:
#0 {main}
thrown in C:\inetpub\wwwroot\mantis\vendor\guzzlehttp\psr7\src\FnStream.php on line 15