Custom colors and images not updating

I recieved a response for this inquriy yesterday, however, it didnt work. Can anyone else help me out with the following issue?

When I go into the custom styling under Appearance in the backend of my theme and change the color of the different sections on my website, it doesnt update. I even click save after I make the changes. When I try and change the background color or I try to place a image url in the section for the background, my website doesnt update.Do you know a reason for why this is happening?

Its happening with all the themes I install to my site