@stiff spade Your Panel remote URL in the Wings config.yml does not match with the URL from which you're making the request. Make sure that they match for the connection to work.
If you know what you are doing and are intentionally trying to use a different origin, make sure to add it to your Wings config.yml allowed origins as shown in the example below. Use correct HTTP or HTTPS scheme. Wildcard '*' can be used to allow all origins.
allowed_origins:
- https://test.source.com
- http://another.panel.com
Restart Wings systemctl restart wings to apply the change.