Hmm, if you really have tried everything (i.e Puffin) and the problem persists for hours then I could think of two things.

1)Send a support ticket to Nutaku.
2)Post about it on the FKG discord in #issue_reports. If you do, remember to be as detailed as possible, maybe provide a screenshot, and provide your Nutaku ID.

I can't guarantee that they will respond immediately however. I haven't seen any posts on here or on discord about loading issues so it may be an issue unique to you.