Hello,
1) Your prefooter area was added to header banner area.
2) Home page was not set in Settings > Reading.
3) You need to choose the Lato font in Typography settings and I chose the bold style for the headings
4) I have added the following custom to increase the categories font-size
.category-grid .categories-mask h4 {
font-size: 1.71rem;
margin: 0.3em 0;
}
5) I have updated the WPBakery (Visual Composer) plugin.
Check the staging site now and let me know if you need to fix anything else.
Regards