Fatal error: Uncaught Error: Class "League\OAuth1\Client\Signature\Signature" not found in C:\Apache24\htdocs\BookStack\vendor\league\oauth1-client\src\Signature\PlainTextSignature.php:5 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\BookStack\vendor\league\oauth1-client\src\Signature\PlainTextSignature.php on line 5