We've been seeing that one lately, might have had a channel update in the background when you closed it. Typically a restore from seed words will get your balances and state fixed again. Download the state file before doing it just in case.
Closed my nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg channels and now when i try to load it, it says “Error: Failed to read data from storage.”
Discussion
i have a temporary suggestion that you might hate @mutinywallet
put in a l-btc wallet function in your wallet (with boltz.exchange built in)
in that way, user can keep big funds there while waiting for your lightning wallet channels to become more stable
Perfect 
Make sure to download the state file then. The info is in there for a full recovery.
I had tried doing that a few times, but it would give me either the same error or one that said mutiny is already running. Luckily found the sticky note and all is well
Sorry about that, we need to update the language for the already running error. That goes away after 2 minutes when the wallet was last accessed. We need to make sure it's not running at multiple places at the same exact time.