Many thanks for the update @rosemberg-lozano, and in particular the screenshot exhibiting the search button markup. From reviewing this I noticed a ft-floating-toolbar div, which is not within the Site Kit plugin codebase.
While this isn’t a Site Kit feature, I would be happy to help you in trying to determine the cause. In order to do so, please perform the steps below:
- Login to your live site from a Chrome browser incognito window.
- Install and activate the Health Check & Troubleshooting plugin.
- Navigate to “Plugins > Health Check & Troubleshooting > Troubleshoot”.
- From the same screen click on the “Available Plugins” tab at the top right and then click on the “Enable” option next to “Site Kit by Google“.
- Check for the same error.
The above will determine whether the search bar appears with only Site Kit active. Should it appear, then there may be something at host level which is resulting in this addition.
Let me know how you get on with the above.