The preview could not load due to a http/https mismatch. Please check that HTTPS is properly configured on your site

[n2k]

I received the error “The preview could not load due to a http/https mismatch. Please check that HTTPS is properly configured on your site.” Since I’m using a multi-site, I wasn’t able to change the WP_HOME and WP_SITEURL in the wp-config as suggested. The below solution worked for me and I thought to share it for those that encounter the same issue:

1. Comment out the multisite code in wp-config.php
2. Login again to WP
3. Go back to settings and reading as if a single site.
4. change http to https
5. uncomment multisite code in wp-content
6. Proceed as normal

This is the site where I found the solution: https://wordpress.stackexchange.com/questions/313294/multi-site-change-the-url-of-main-site-to-https

[tristup]

Hi Nellie,

Thanks for sharing the solution, it will definitely help others.

Thanks