Hello,
Thank you for contacting Rank Math support, and sorry for any inconvenience that might have been caused due to that.
It seems that a 508 error appears when an account exceeds the resources assigned to it. Please get in touch with your hosting provider and ask them to increase the resource limit and let us know.
Also, please ask your hosting provider for the recent error logs if there are any.
Looking forward to helping you.
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.