Invalid Request R1 - refill_unblinded_tokens

Briefly describe your issue:
I have not received ads since last August. I’m seeing the “Invalid Request R1” error in the brave://rewards-internals/ logs.

[Dec 07, 2021, 4:15:28.2 PM:VERBOSE6:refill_unblinded_tokens.cc(221)] URL Response:
  URL: https://ads-serve.brave.com/v1/confirmation/token/982dea4d-****-****-****-69b4dc96a6c0?nonce=6f8b3e02-62b9-4727-aa32-414e6cccb094
  Response Status Code: 400
  Response: "Invalid Request R1"

What Operating System and Brave version are you using (Menu --> About Brave)?
Version 1.32.113 Chromium: 96.0.4664.45 (Official Build) (64-bit)

Is your browser wallet currently verified? (yes/no)
yes - Uphold

What date did you verify your wallet?
26 November 2021

Have you been able to successfully receive payments in the past?
yes

Are you using a VPN? (yes/no)
no

Are you in a supported region (see here for list of supported regions)?
yes

Does your device pass the SafteyNet check (Android only)?
Windows

Have you manually turned off Auto-contribute on all of your devices linked to Uphold??
no

Does anyone have any suggestions?

Anyone from Ads Support like to comment please?