Sounds like you have your site’s url configured to http - it will need to be https for previews to work because browsers have started blocking non-secure iframe content. Same issue as in Post preview is blank - #6 by TheMadMan007
Sounds like you have your site’s url configured to http - it will need to be https for previews to work because browsers have started blocking non-secure iframe content. Same issue as in Post preview is blank - #6 by TheMadMan007