I understand that you're facing an issue with the "Fetching connector failed" error when trying to add a connector using a Docker image. Based on the information extracts provided, I can suggest a few steps to troubleshoot the issue: 1. Check the server logs for any error messages or details. You can do this by running the following command:

docker logs airbyte-server

2. Make sure you have pulled the Docker image to your machine before trying to add the connector in the Airbyte UI. You can pull the image using the following command:

docker pull <repository_name>:<tag>

3. Ensure that you have provided the correct Docker repository name and tag when adding the connector in the Airbyte UI. 4. If you're using a custom connector, make sure you have followed the necessary steps to build and package your connector in a Docker image. You can refer to the [Airbyte documentation on custom connectors](https://docs.airbyte.com/integrations/custom-connectors) for more information. If you're still facing issues, please provide more details about the connector you're trying to add and any relevant logs or error messages.