Greasy Fork

Can anyone explain this message? I understand I've done a total of 10k+ attempts on Music of Chaos boss [5000 on just on level 210] in total across all levels but it just doesn't explain WHY this pops up?

[If the image doesn't pop up it states: "Error: NotAvailable. Boss battle limit exceeded. Please try again later."]

I created a post about this previously just a few hours ago: https://greasyfork.org/en/scripts/450693-herowarshelper/discussions/263526