400: Invalid Request R1?

Briefly describe your issue:
I am seeing an error message in my brave logs when sending unblinded tokens to brave servers, when this happens I am getting a Http status: 400 with error: “Invalid Request R1” -
There’s no information on this error. What does “Invalid Request R1” exactly mean?

Seems like my account might be shadow banned for some reason but ads are still being shown and counted - this is very sneaky if this is the case especially since Brave is cashing in on each ad shown to users, I would like to be proven wrong about this, so please enlighten me.

Exact error message below:

[13612:4284:0712/154021.640:VERBOSE1:redeem_unblinded_payment_tokens.cc(108)] OnRedeemUnblindedPaymentTokens
[13612:4284:0712/154021.640:VERBOSE6:redeem_unblinded_payment_tokens.cc(110)] URL Response:
  URL: https://ads-serve.brave.com/v1/confirmation/payment/ba05c4fc-****-****-****-369e9b304e3f
  Response Status Code: 400
  Response: "Invalid Request R1"
[13612:4284:0712/154021.640:VERBOSE1:redeem_unblinded_payment_tokens.cc(114)] Failed to redeem unblinded payment tokens
[13612:4284:0712/154021.640:VERBOSE1:account.cc(198)] Failed to redeem unblinded payment tokens

What Operating System and Brave version are you using (Menu --> About Brave)?
Windows 10

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

What date did you verify your wallet?
N/A

Have you been able to successfully receive payments in the past?
No

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)?
N/A

Have you manually turned off Auto-contribute on all of your devices linked to Uphold??
Yes

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