401 response from Backblaze

Please describe what you are doing to trigger the bug:
Using Duplicacy WebUI via Unraid to create Backblaze B2 storage

Please describe what you expect to happen (but doesn’t):
KeyID and AppKey seem to authenticate because the desired bucket populates, but errors out when clicking Continue to add.

Please describe what actually happens (the wrong behaviour):
Via log:
2021/12/17 15:29:01 TRACE BACKBLAZE_CALL [0] URL request ‘POST https://api.backblazeb2.com/b2api/v1/b2_authorize_account’ returned 401
2021/12/17 15:29:01 ERROR STORAGE_CREATE Failed to load the Backblaze B2 storage at b2://: Authorization failure

2021/12/17 15:29:01 ERROR STORAGE_CREATE Failed to load the Backblaze B2 storage at b2://: Authorization failure

2021/12/17 15:29:01 Failed to check the storage at b2://eyeCandyPhotography: Failed to load the Backblaze B2 storage at b2://: Authorization failure

Tried deleting and recreating bucket. Confirmed that application ID has access to all buckets (only one bucket exists) and is set to ‘Read and Write.’ Disabling encryption on bucket also made no difference.

Can you access the same bucket with another app, such as CyberDuck or Transmit, using the same credentials?

It’s either wrong credentials or backblaze outage.