Please send a log if possible and I'll try to figure out the reason:
Settings > Advanced > Send Error Report
Hey nostr:npub1yvjfcngw8hk9u2fyph7zfrhekk2y2kzyrcekxyuudran7krlrv7quh0z5d
What can I do to withdraw my Sats?
I keep getting this error message...

Please send a log if possible and I'll try to figure out the reason:
Settings > Advanced > Send Error Report
You can also close channels from the Advanced menu:
Settings > Advanced > Channels