Sync not working

Auto syncing: Not Configured

When I click the button, “Enable auto sync”, I got the message “No route was found matching the URL and request method” and it failed.

Checking at the URL called, I see the URL https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/enable is called and responds with a 404.

When I try to manually synchronize, I got a confirmation message but new comments are not sync, I tried multiple times. I see that the URL https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/comment is called which is also a 404.
When I access https://blog.fabianpiau.com/en/wp-json, I can see from the response that I have different endpoint for disqus.

"/disqus/v1": {
      "namespace": "disqus/v1",
      "methods": [
        "GET"
      ],
      "endpoints": [
        {
          "methods": [
            "GET"
          ],
          "args": {
            "namespace": {
              "required": false,
              "default": "disqus/v1"
            },
            "context": {
              "required": false,
              "default": "view"
            }
          }
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1"
      }
    },
    "/disqus/v1/sync/webhook": {
      "namespace": "disqus/v1",
      "methods": [
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/webhook"
      }
    },
    "/disqus/v1/sync/comment": {
      "namespace": "disqus/v1",
      "methods": [
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/comment"
      }
    },
    "/disqus/v1/settings": {
      "namespace": "disqus/v1",
      "methods": [
        "GET",
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "GET",
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/settings"
      }
    },
    "/disqus/v1/sync/status": {
      "namespace": "disqus/v1",
      "methods": [
        "GET"
      ],
      "endpoints": [
        {
          "methods": [
            "GET"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/status"
      }
    },
    "/disqus/v1/sync/enable": {
      "namespace": "disqus/v1",
      "methods": [
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/enable"
      }
    },
    "/disqus/v1/sync/disable": {
      "namespace": "disqus/v1",
      "methods": [
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/sync/disable"
      }
    },
    "/disqus/v1/export/post": {
      "namespace": "disqus/v1",
      "methods": [
        "POST"
      ],
      "endpoints": [
        {
          "methods": [
            "POST"
          ],
          "args": []
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/disqus/v1/export/post"
      }
    },
    "/jetpack/v4": {
      "namespace": "jetpack/v4",
      "methods": [
        "GET"
      ],
      "endpoints": [
        {
          "methods": [
            "GET"
          ],
          "args": {
            "namespace": {
              "required": false,
              "default": "jetpack/v4"
            },
            "context": {
              "required": false,
              "default": "view"
            }
          }
        }
      ],
      "_links": {
        "self": "https://blog.fabianpiau.com/en/wp-json/jetpack/v4"
      }
    },

Is it an issue on my side? Or the plugin is currently broken?

Thanks.

Fabian