Paid Gemini API returns "User location is not supported"

Hello. I am a paid Tier 1 customer of the Gemini API. All my API requests to https://generativelanguage.googleapis.com return the following error across multiple projects and API keys: HTTP 400 FAILED_PRECONDITION “User location is not supported for the API use.”
Browser access to aistudio.google.com is also redirected to /available-regions.
Why does my paid account get this error? If the answer is that my account is geo-restricted regardless of valid IP/region settings, please refund my balance - I paid for service access that you are refusing to provide.

Hello @Alex_Kirillov ,

This could be specific to your IP address. Please report it on our Report IP problems page. Suggested workarounds which may help for now:

  • Try temporarily switching to a different network (e.g. try with the hotspot from your phone if available).

  • Try asking your host for a new IP.

  • Trying switching between IPv6 / IPv4.

I’ve tried all of this and also specified the location using your link. The problem is the same – redirected to https://ai.google.dev/gemini-api/docs/available-regions. Please refund my balance.