I'm going to copy the issue I posted in OliveTin/Project One-Click over here to see if anyone else has any ideas:
I'm using a G454V (Chromecast HD, not a 4k), though it is running Android TV 14. Over the weekend, I created the ADBTuner container, and added the tuner. After the initial miss on setting USB Debugging, I enabled that, the status check caused the authorization prompt, which I allowed, and ADBTuner was happy. Now... it's not happy. The status is "Android Connection Failed". The log says stuff like
2026-03-03 17:13:17.378 - lib.adb - [Errno 111] Connection refused
2026-03-03 17:13:17.378 - lib.adb - ADB: Connection failed.
2026-03-03 17:13:17.379 - lib.adb - ADB: Error while running command. Check for approval popup on device.
But no approval popup is happening now, it happened once right after I turned on USB debugging and checked the status, but not since. The IP address hasn't changed and is correct. I'm doing a PING from the host and it's not having any issues. I've restarted the Chromecast, without any change. Restarting the ADBTuner container didn't help. Disabling developer mode, revoking ADB authorizations and disabling USB debugging, then re-enabling hasn't changed anything.
Update: I tried connecting to port 5555 and 5037 using TELNET and neither established any kind of connection.