Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
It usually happens when you have an extra space character in some parts of your theme files (places where it shouldn’t be there).
If you want, we can try to fix it for you (since it is usually difficult to find since it is an empty character). Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.
It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead: