Google Calendar getting error 400: invalid_request durning setup

Configuration
1

I have been trying to get Google Calendar integration setup in HAOS. I have setup Google console and discribed in the documentation [Google Calendar - Home Assistant](https://www.home-assistant.io/integrations/google/)
that did not work, I have re-created new project in Google console using different urls. I used https://my.home-assistant.io/redirect/oauth and also my Nabu Casa url, all of which have not worked. I just keep getting the 400: invalid_request error. The following is what I got after searching for a solution

400 invalid_request
If you get an error that says “400 invalid_request” or “Access blocked, it means the app sent an invalid request.” The app uses an authorization method that Google doesn’t allow.

Google has safe ways for you to sign in and share your Google Account data with third-party apps and services. To help protect your account, Google blocks apps that could put your account at risk.

Tip: Learn how Sign in with Google shares your data safely.

What can you do about this error?
Only the third-party developer can fix this issue. To report the error, contact the developer directly.

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Home Assistant is listed in my third-party apps in Google.
I’m running HAOS version 2025.6.3 in a vm on Proxomx .
I have been at this for days any help would be very appreciated.

2

Same here - I initially thought it was because I had old credentials stored in HA but removing them makes no difference…

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yeah I’m trying to recover from a re-install from backup and things did not go as writen. I read a lot of what to do and tried 4 days of re-creating Google console stuff, follow YouTube video. followed HA docs on how to setup Google Calendar. So far nothing has worked

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I got it to work just followed this video I got it I watched this video https://www.youtube.com/watch?v=-2-LK6Ry4hU. Menus have changed but you may get what needs to be done

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