Hello,
Thanks for contacting us and sorry for any inconvenience that might have been caused due to that.
You should not manually add any Schema to the Contact Us page. The pages like Contact Us and About Us should use the default Schema applied from Rank Math. Please navigate to WP Dashboard > Rank Math > Dashboard and enable the Local SEO module. Then navigate to WP Dashboard > Rank Math > Titles & Meta > Local SEO and select your Contact Us page from the drop-down for the Contact Page.
Once you save the settings, Rank Math will automatically apply the Schema based on your Local SEO settings to your Contact page.
Here is a guide for setting up the Local SEO module: https://rankmath.com/kb/local-seo/
Hope this helps. Let us know if you need any further assistance.
Hello,
Glad that helped.
Please feel free to reach out to us again in case you need any other assistance.
We are here to help.
Thank you.