Hello @vdrover
Thank you for contacting the support and sorry for the issue you are facing.
As of now, it seems like only a handful of users are affected. We are unable to replicate this issue from our end but we have contacted Google about this and will have a fix very soon.
This is happening because the plugin outgrew our API requests and we have requested Google to increase the quota asap.
We should have a fix ready within this week and will release an update. You can check the progress here:
https://rankmath.com/changelog/#known-issues?
Again, extremely sorry for the issue you are facing and we seek your patience and understanding in this matter.
In the meantime, if there’s anything else we can help you with, please do let us know. We are here to help.
Good day.