Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
To bring back the website, login to your hosting control panel and access the file manager, then go to the wp-content/plugins/ folder and delete the SEO-by-rank-math plugin folder.
There has to be a plugin conflict with the Rank Math, to find out. First, disable all the plugins from your website, Active the Rank Math plugin and do the setup, then later enable the plugin one by one and check which page is causing the issue.
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.