Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
Could you please share the error log reported when the critical error happened to check and advise accordingly?
You can add it in the sensitive data section

It is completely secure, and only our support staff has access to that section.
Looking forward to helping you.
Thank you.
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Thanks, I added the error trace.
Hello,
Since you are using a custom implementation of WordPress we recommend that you check if the server stack allows for the use of the following library that we call in that class: https://github.com/deliciousbrains/wp-background-processing
Also, due to the custom implementation in place, some functionality of the plugin might not work as expected because we didn’t fully test our plugin with Bedrock so we can’t confirm if everything is properly going to work.
Don’t hesitate to get in touch if you have any other questions.
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.