Error: Invalid site state null

Hi Akash,

Thanks for reaching out. We’re aware of this error which has appeared for some users when adding a subdomain site that already exists within their AdSense account. While we’re still investigating the specific cause, we do have a workaround. Can you perform the steps below:

1. Log in into your AdSense account from adsense.googe.com, navigated to the “Sites” tab
2. Select the parent domain site and delete the sub-domain which you’ve used to connect Site Kit with
3. Attempt Site Kit set up once more

Let me know how you get on with the above, or ask if you have any questions.

when i remove subdomain from AdSense and Attempt Site Kit set up AdSense is done but its subdomain ads connected or main domain AdSense connect how i know?

You can connect AdSense on both the parent domain and the subdomain if you wish. You will need to have the parent domain approved for ads before ads can be served on the subdomain.

I’ve also checked your subdomain site and I can see ads appearing. I also can see a valid AdSense snippet placed when checking your sites source code.

Let me know if you have any further questions on this.

Means now I don’t need to add adsense on subdomain ? Ads shown means I get revenue form that? No need to do any other settings?

If your parent domain is already approved for ads within AdSense, then your sub domain sites can also have ads served, which will contribute towards your AdSense revenue. They don’t need to be reviewed individually.
https://support.google.com/adsense/answer/9130110?hl=en

For any further AdSense specific questions you can reach out to the product experts over at the AdSense Help Center.

As we didn’t receive a response I’ll mark this as resolved. Feel free to open a new support topic if you continue to encounter issues, or reopen this topic and we’d be happy to assist.