Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Please make sure you’ve connected correct Google account and try re-connecting your Google account with Rank Math by following the steps below:
1. Remove Rank Math’s access from Google
Please remove RankMath’s app from your Google apps permissions:
https://myaccount.google.com/permissions

2. Re-connect Google Account
After that, reconnect the Google account again by going to WordPress Dashboard > Rank Math > General Settings > Analytics and configure the Search Console and Analytics settings again properly:

3. Grant all necessary permissions
Kindly check all necessary checkboxes to allow Rank Math to access some of the Google Services. Please check my screenshot below for reference:

If the settings are not getting saved properly, please try saving the settings for the Analytics with a different browser such as Google Chrome. If you still face some issues with Chrome, then you can try it in Incognito mode just to save the settings.
Let us know how that goes. Looking forward to helping you.
Thank you.
Evening,
I had tried the above steps, multiple times but they did not work for me.
Eventually, I created an account with google analytics and also tried to verify the correct version of my website on Google Search Console (HTTP or HTTPS, www or non-www). I could not go all the way through, as it would not accept my mobile phone number.
Eventually, the website showed up in the correct spots and things started to work on their own.
If I encounter it again, I will look into the problem more deeply, but for now it is resolved.
Thank you for the response.
Hello,

Thank you for the update.
We are super happy that this issue is already resolved. If you have any other questions in the future, know that we are here to help you.

If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.

If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.

Thank you.