启动REST服务器的问题，启动composer-rest-server时出现错误 作曲者的版本是v0.20.9 composer-rest-server版本v0.19.20

这是日志：

  nithin@:~/fabric-tools/fabric-dev-servers$ composer-rest-server
        ? Enter the name of the business network card to use: admin@test-bna
        ? Specify if you want namespaces in the generated REST API: always use namespaces
        ? Specify if you want to use an API key to secure the REST API: No
        ? Specify if you want to enable authentication for the REST API using Passport: No
        ? Specify if you want to enable the explorer test interface: No
        ? Specify a key if you want to enable dynamic logging: 
        ? Specify if you want to enable event publication over WebSockets: No
        ? Specify if you want to enable TLS security for the REST API: No

        To restart the REST server using the same options,issue the following command:
        composer-rest-server -c admin@test-bna -n always

        Discovering types from business network definition ...
        Connection fails: Error: Error trying to ping. Error: Composer runtime (0.20.9) is not 
        compatible with client (0.19.20)
        It will be retried for the next request.
        Exception: Error: Error trying to ping. Error: Composer runtime (0.20.9) is not compatible with client (0.19.20)
        Error: Error trying to ping. Error: Composer runtime (0.20.9) is not compatible with client (0.19.20)
        at _checkRuntimeVersions.then.catch (/home/nithin/.nvm/versions/node/v8.16.2/lib/node_modules/composer-rest-server/node_modules/composer-connector-hlfv1/lib/hlfconnection.js:842:34)
        at <anonymous>