I am into the same situation but my environment is vcenter based.

the SE's are unable to join controller and i am unable to figure out what is happening.

I have console access to the SE but the admin / admin doesn't works for me.

my controller version is 30.2.2-9108.

Output of https:///api/securechannel-status?is_controller=false

{"count": 2, "results": [{"_last_modified": "1729534976401619", "is_controller": false, "marked_for_delete": false, "name": "se-b00dcc3a-5b6a-4a52-8e6c-740cd6733e05", "status": "SECURE_CHANNEL_NONE", "uuid": "se-b00dcc3a-5b6a-4a52-8e6c-740cd6733e05", "url": "https://10.65.41.160/api/securechannelmapping/se-b00dcc3a-5b6a-4a52-8e6c-740cd6733e05"}, {"_last_modified": "1729534976404044", "is_controller": false, "marked_for_delete": false, "name": "se-994c00e4-3754-47d5-b72b-c303daa0727b", "status": "SECURE_CHANNEL_NONE", "uuid": "se-994c00e4-3754-47d5-b72b-c303daa0727b", "url": "https://10.65.41.160/api/securechannelmapping/se-994c00e4-3754-47d5-b72b-c303daa0727b"}]}

Any pointers on login credentials OR secure channel is appreciated. My gut feeling is that IP address is not assigned to the SE as i am unable to ping it from the controller when connected using SSH.

TIA Hitesh TIA