Fatal error: Uncaught Error: Interface "Mdanter\Ecc\Serializer\Signature\DerSignatureSerializerInterface" not found in /home/pay/public_html/vendor/web3/mdanter/ecc/src/Serializer/Signature/DerSignatureSerializer.php:8 Stack trace: #0 {main} thrown in /home/pay/public_html/vendor/web3/mdanter/ecc/src/Serializer/Signature/DerSignatureSerializer.php on line 8