Recently, I created a PowerPoint presentation and then converted it to HTML using the conversion tool available at . The result on their website is exactly what I wanted, with a perfect layout. However, when I downloaded the zip file and uploaded the contents to my new website (which runs on Ubuntu and PHP7), I noticed that the blue background was missing.
You can see the issue on my site at . Strangely enough, when I repeated the same process on another website hosted by a different provider at , the visual appearance was correct as intended.
I suspect that there may be a component missing on the server where my first site is hosted, causing this discrepancy. I have been unable to identify the specific missing component so far. Any insight or suggestions would be greatly appreciated. Thank you!