Hello,
Thank you for contacting the support, and sorry for any inconvenience that might have been caused due to that.
Please reconnect your Google service account, to regenerate a new auth token from Google, by going to WordPress Dashboard > Rank Math > General Settings > Analytics and configure the Analytics settings:

Do ensure all permissions are allowed: https://rankmath.com/kb/connect-your-google-account/
If the issue persists, let us know and we will further investigate this.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.