Fatal error: Uncaught Error: Interface "League\OAuth1\Client\Signature\SignatureInterface" not found in /home/bimmertest/BookStack/vendor/league/oauth1-client/src/Signature/Signature.php:8 Stack trace: #0 {main} thrown in /home/bimmertest/BookStack/vendor/league/oauth1-client/src/Signature/Signature.php on line 8