if the bot is removed from a guild but still has someone muted there, and reboots before the mute time is over, it will error out, as it no longer has a config loaded for that guild
it also seems in some cases it manages to run before actually finishing loading the config (race issue?)
clearing the mutes file didn't help either, needs some further digging
for now i temp patched the problem: e781258fc40b1e4baf90edb1911a4b3fd172db24
if the bot is removed from a guild but still has someone muted there, and reboots before the mute time is over, it will error out, as it no longer has a config loaded for that guild
it also seems in some cases it manages to run before actually finishing loading the config (race issue?)
clearing the mutes file didn't help either, needs some further digging
for now i temp patched the problem: e781258fc40b1e4baf90edb1911a4b3fd172db24