Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay.
I’ve already passed your concern to our dev team and will be back to you shortly for the confirmation of this plugin compatibility with Rank Math.
Meanwhile, please don’t hesitate to contact us anytime to assist you further with anything else.
Thank you.
Hello,
We appreciate the wait.
The issue with preview cannot be resolved because your permalinks manager is adding the information after the page loads.
Do note that it is an issue with the preview only and your actual URLs will work flawlessly.
If you are encountering any issues, please share more details on how to replicate the problem.
Hi,
I am the author of Permalink Manager plugin. The issue in the plugin will be addressed in the next release. However, I think that you should slightly adjust your JS code in the below file:
plugins/seo-by-rank-math-pro/includes/modules/schema/assets/js/schemaFilters.js
I mean this line of code:

The highlighted function gives a proper URL in most of user cases. The problem appears when one decides to remove trailing slashes from URLs. Then the schema-preview URL is generated incorrectly.
The incorrect URL:
https://example.com/sample-permalink.htmlschema-preview/
The correct URL:
https://example.com/sample-permalink.html/schema-preview/
I think that you should double-check in JS code that the canonical URL ends with trailing slash. If not, the trailing slash should be added to the schema-preview URL.
Best regards,
Maciej
Hello,
Thank you so much for your input.
We have shared your suggestion with the dev. team. We will get back to you on that ASAP.
Hello,
We have an update from the dev. team that the issue you mentioned has already been fixed in the update we released yesterday.
Can you please update to 1.0.59 and see if the issue is still there?
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.