Hello,
Thank you for contacting Rank Math and sorry for any inconvenience caused.
The error is coming from the Image SEO module in the PRO plugin.
If you are using the PRO plugin, check the Replacements settings at Rank Math > General settings > Images and ensure that values for both find and replace are entered:
That should fix the issue.
We look 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.