Dear Prakash,
Thank you for the prompt response.
Please check my comments below.
It seems that the URLs are not fully replaced while moving the site from HTTP to HTTPS and that causes the Mixed Content issue [ HTTP and HTTPS ] blocking to load of the styles files.
I have updated the siteurl and home via phpMyAdmin and I do not see any references of http:// now but a few layout still happening so something still seems to be broken after the X and Cornerstone update.
I would suggest you replace the URL properly and check this again, there are many URL replacement Plugins available in WordPress which help you to replace the URL.
OK, I have done this. I also did a manual search/replace in the database and there are no mixed-content issues now.
Also, remember that the exact URL should be mentioned in Setting > General, WordPress Address and Site URL, including the protocol i.e HTTP/HTTPS.
They are https now.
I also noticed that there is a JS console error, it might be due to a custom JS code or plugin conflict issue. I would suggest you troubleshoot a few of the common issues before we investigate your settings.
I will have a look but it would be great if you could have a look as well at the live site.
If none of those work, It would be best if you could copy your live website to your staging area. and send your details in a secure note so that we can investigate your setting without breaking your live site.
I have created a new staging URL but GoDaddy is causing issues to it as you can see at https://8z4.8ca.myftpupload.com/ and https://8z4.8ca.myftpupload.com/wp-login.php so you have to work on the live site.
Please provide the following details
WordPress Login URL
Admin-level username and password
As mentioned above, the new staging site is not working so please check the issue on the live site (I have already provided you access in the secure note).
Look forward to hearing from you.
Thanks in advance.
Stavros