If you do not have any funds in that node, I suggest to start from scratch, wipe everything and start a new instance. Possible that in the past, some files get corrupted and your user data cannot create a lnd wallet.
Instead of trying to fix, is much easier and clean to start a new node instance.
If you had funds in that node and you have a backup of your LN channels, then just restore the funds into Blixt wallet and start from scratch a new umbrel instance. Here you have a guide how to recover your funds