Hello,
We apologize for the issue you are facing after migrating your site to a new domain. It seems that the old dev server address is still being referenced in your page code, which can happen if the URLs were not updated correctly during the migration process.
Here are a few steps you can take to resolve this issue:
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Check Site URL Settings: Ensure that both the WordPress URL and Site URL are set to your new domain. You can check this by navigating to WordPress Dashboard → Settings → General.

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Update Database URLs: Sometimes, URLs may still be stored in the database. You can use a plugin like Better Search Replace to search for the old domain and replace it with the new one throughout your database.
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Clear Cache: If you have any caching plugins or server-side caching, make sure to clear all caches after making these changes.
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Check Theme and Plugin Settings: Some themes or plugins may have their own settings where the old URL might be hardcoded. Check those settings and update them accordingly.
If you have followed these steps and are still encountering issues, please reply to this ticket, and a human agent from the Rank Math Support team will assist you further.
Thank you for raising this concern!
Sources:
How to Fix Problems While Connecting Account Using Rank Math » Rank Math
Hello,
Please update the website name and other data in Rank Math > Titles & Meta > Local SEO:
https://rankmath.com/kb/local-seo/#local-seo-settings
Once done, clear your website’s cache and check again the source code.
Looking 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.