I was using CodeKit to compile my local dev environment and it erred out on the file gp-premium/page-header/functions/css/metabox.css On line 248 there is a miscellaneous period before the id generate_page_header_meta_box. The selectors read as follows:
.admin-color-coffee .#generate_page_header_meta_box .lcs_switch.lcs_on {
background: #c7a589;
box-shadow: 0 0 2px #c7a589 inset;
}
It should read:
.admin-color-coffee #generate_page_header_meta_box .lcs_switch.lcs_on {
background: #c7a589;
box-shadow: 0 0 2px #c7a589 inset;
}