Error in Additonal CSS in Dispatch Site Library

https://prnt.sc/r4r77p

Hey,

After installing Dispatch Site Library am getting error in the below code, Could you please do the needful...

@media (min-width: 900px) {
.wpsp-grid .wp-show-posts {
grid-template-columns: repeat(8, 1fr);
grid-template-rows: 1fr auto;
}

Refer the screenshot for more info.