Another simple fix for this is to simply delete tls.cert/tls.key and restart lightning. You can do so with the following steps:
- Open a terminal window on your computer. On macOS, you can open the Terminal app that’s installed by default on every Mac. On Windows, you can open Command Prompt or the PowerShell app.
- Type in the following command
ssh -t umbrel@umbrel.local
and press the Enter key - Run
sudo rm ~/umbrel/app-data/lightning/data/lnd/tls.cert
andsudo rm ~/umbrel/app-data/lightning/data/lnd/tls.key
- You can then run
umbreld client apps.restart.mutate --appId lightning
. After restarting, new certs will be populated for you.