Welcome to the Make community!
For more information, do view these similar questions previously asked by other community members, which may answer your question:
- The operation failed with an error. [404] Nie znaleziono routingu pasującego do adresu URL oraz metody zapytania. (error code: rest_no_route)
- Connect Make and Wordpress
- Wordpress 404 error
Try disabling all plugins (including security plugins), reinstalling Wordpress again, or contact your web developer to remedy this.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.