Ghost version 6 websocket not initialised

[Ahson-Shaikh]

Hi everyone. I'm from Easypanel Team. We are getting an error while upgrading to the latest version of the Image to 6.0.0.

[2025-08-05 10:59:22] INFO Explore Response 200 OK
[2025-08-05 10:59:23] INFO "GET /.ghost/activitypub/v1/site" 301 374ms
[2025-08-05 10:59:23] INFO "GET /.ghost/activitypub/v1/site/" 404 112ms
[2025-08-05 10:59:23] ERROR Could not get webhook secret for ActivityPub FetchError: invalid json response body at https://uptime-kuma-ghost.klorzb.easypanel.host/.ghost/activitypub/v1/site/ reason: Unexpected token '<', "<!DOCTYPE "... is not valid JSON
[2025-08-05 10:59:23] ERROR No webhook secret found - cannot initialise

We would require assistance in solving this. Thanks!