Hi,
Great. I must tell you that the most common cause of JavaScript errors on a Muse page is .js files missing from the server or .js files, or other files on the server, not all being from the save version of Muse. If you're using an external FTP client, you must re-upload all files and folders whenever a site is exported using an updated version of Muse (since the code generated by Muse changes from release to release to improve page load performance, support new features, address new browser versions and/or devices, etc., etc.).
The second most common cause of JavaScript errors on a Muse page is buggy embed code and/or embed code that conflicts with the JavaScript used by Muse.
Regards,
Rohit Nair