Leiloni.7951:

Getting this error on GW2 Efficiency and on Reddit a lot of other people are mentioning they’re getting it as well. Generating a new key doesn’t help.

Gilj.6304:

On 2 different accounts [ and 2 other keys that work].
Generating a new API key doesn’t seem to fix it.

Thanks, Gilj.

sookya.8625:

Problem was fixed after first patch, but the second (the hotfix) broke it again

EttinTracker.6504:

I just want to add “me too”. I hope this gets fixed soon.

Nekres.1038:

Can confirm, it’s broken. (Tested on wallet data.)

sookya.8625:

See https://forum-en.guildwars2.com/forum/community/api/text-ErrBadData-since-last-patch

Edarkness.7543:

sameeeeeeeeeeee

Illconceived Was Na.9781:

See also:
https://forum-en.guildwars2.com/forum/support/bugs/API-key-problem/6282212

Vendetta.1958:

24 of my users have perfectly valid API keys that are returning junk data 50% of the time.

sookya.8625:

Seems to be fixed since a few minutes – my backendscripts running without BadData-Errors now! yay!

sookya.8625:

Update: Should be fixed now. Thank you Pat