It looks like zaptec have change the authentication method is some way. It is not possible to login using the homey app. See also the statement on their portal.
How can I login again with the homey app? The repair option is not working.
Errors in the log of the homey app
[2025-11-03T21:16:00.665Z] Failed to poll charger state: Error: Unexpected response statusCode 401
[2025-11-03T21:16:00.712Z] Failed to poll charger info: Error: Unexpected response statusCode 401
[2025-11-03T21:16:00.758Z] Failed to get installation info when updating available current: Error: Unexpected response statusCode 401
