"mc" error?

I am not sure what this error means, I can’t find anyone else having this specific error either, however it seems to come from any calls to a datastore such as

data:GetAsync(plr.userId.."Decks")

Does anyone know anything about this error?

edit: I’m not sure if this is just a local problem? I fresh re-installed roblox studio and I still have this error, however it is happening with all datastores in any of my places now.

edit2: I tested it a bit in a new place, however when I use the :SetAsync() for the datastore, it says that the API access is not enabled however when I checked, it was allowed:

If I use :GetAsync() or :UpdateAsync() it gives me the “mc” error regardless.

Do you by any chance have fiddler set up to intercept https?
Or do you have a proxy server through which your https is tunneled?