Hello,
I’m sorry to hear about the critical error you are experiencing with Rank Math Free version. To assist you better, could you please provide more details about the specific error you are encountering? Additionally, if you have any error logs or messages related to this issue, sharing them would be helpful for our team to diagnose and resolve the problem efficiently.
If you need assistance in locating the error log within Rank Math, you can refer to the Error Log section in Rank Math. Here is an example of how the Error Log section looks:

If you encounter any technical glitches with Rank Math, our support team is available to help. Feel free to reach out to us directly by clicking here.
We appreciate your cooperation in providing more information to resolve this critical error promptly. Thank you for bringing this to our attention.
Warm regards.
Sources:
I Purchased Rank Math PRO but Rank Math is Still Showing FREE » Rank Math
Rank Math PRO 3.0 Nulled, GPL & Cracked & Save Your Website
Resolving Rank Math Analytics Related Issues » Rank Math
Rank Math Status and Tools » Rank Math
Hello,
I have updated the sensitive data as requested. Can you please check further?
Thank you.
Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
Please head over to WordPress Dashboard > Rank Math > General Settings > Breadcrumbs and change the “Search Results Format” to: Search for %s
Once done, clear your website’s cache and see if that fixes the issue.
Let us know how that goes. Looking forward to helping you.
Thank 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.