I had a css rule to assign custom colors to the buttons in the grid of the last posts on the homepage. After the last update of the template to version 4.0, it seems that it does not work anymore.
The rule is as follows:
/* button grid post in homepage*/
.vc_btn3.vc_btn3-color-juicy-pink, .vc_btn3.vc_btn3-color-juicy-pink.vc_btn3-style-flat {
background-color: #222222;
}
.vc_btn3.vc_btn3-color-juicy-pink.vc_btn3-style-flat:focus, .vc_btn3.vc_btn3-color-juicy-pink.vc_btn3-style-flat:hover, .vc_btn3.vc_btn3-color-juicy-pink:focus, .vc_btn3.vc_btn3-color-juicy-pink:hover {
background-color: #b98b1b;
}