When I call Conversion API，the editor seems to be blocked

Docs API
7

The issue is not related to the conversion request you are sending.
The Document Server does not allow using internal IP addresses by default.In order to avoid this, open /etc/onlyoffice/documentserver/default.json inside the docker container => find the parameter allowPrivateIPAddress and change its value to true

"services": {
    "CoAuthoring": {
        "request-filtering-agent" : {
            "allowPrivateIPAddress": true,
            ...
        }
    }
}

After that execute supervisorctl restart all and check if the issue persists.