Dear Apex team,
When I am editing my website (fidtips.com.br) on Cornerstone I can’t see the website preview so that I can not see what is happening with the webpage unless I refresh the website to check what has happened.
This image shows what happens:

I have followed the 5 steps described here (https://theme.co/apex/forum/t/cornerstone-preview-not-loading-due-to-incomplete-iframe-response/35026) but it did not solve.
Could you help me?
Best
