Fatal error: Uncaught Error: Interface "Lcobucci\JWT\Signer\Ecdsa\SignatureConverter" not found in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/lcobucci/jwt/src/Signer/Ecdsa/MultibyteStringConverter.php:28 Stack trace: #0 {main} thrown in /srv/disk1/2895578/www/whittonphotographicclub.org.uk/concrete/vendor/lcobucci/jwt/src/Signer/Ecdsa/MultibyteStringConverter.php on line 28