No, I mean ssh into your umbrel node using

ssh umbrel@

and then

printenv APP_LIGHTNING_NODE_IP

printenv APP_LIGHTNING_NODE_GRPC_PORT

But I think this is not necessary, you should be having all the LND files, can you just uninstall and install Alby Hub again?

The issue must be that the tls certificate was empty when AlbyHub was first run, so i sets it to empty and never updates it if it was set later. This is fixed in dev and will be released in the next version!

Let me know if that works!