I made a powerpoint presentation & converted it to HTML at https://www.idrsolutions.com/online-powerpoint-to-html5-converter The output html page on the mentioned site looks perfect for me. But after I downloaded zip and put the contents on my new site (Ubuntu & PHP7 fresh install) I don't see the blue background. My site is https://castaneda.su/DK/221023 I tried to make these steps for my another site https://alpin52.ru/221023 (preconfigured by host provider) and the look is as required. I think the problem is that I missed installing some component on the server. But I cannot figure out which. Thanks.

CodePudding user response：

I believe that's because you are missing HTTPS in the new domain so the browser is skipping some resources it considers insecure to load over non-HTTPS. Fix your HTTPS certificate situation and this problem should go away.

CodePudding user response：

I used the inspect element to see the source code and saw that the div with the id (pg1Overlay) had the style

width:100%; height:100%; position:absolute; z-index:1; background-color:rgba(0,0,0,0); -webkit-user-select: none;

so I changed it to

width:100%; height:100%; position:absolute; z-index:1; background-color:blue; -webkit-user-select: none;

and then the page was blue