I have made my first website using MVC 5 which works fine on my local machine but when I publish it to the server some of the CSS is not minifying correctly.
What I did was, in my BundleConfig.vb (cs), I put all the files I referenced by @import within the css files like this:
bundles.Add(New StyleBundle("~/bundle/css-account") _
.Include("~/Content/consola/bootstrap/css/bootstrap.css",
"~/Content/consola/plugins/node-waves/waves.css",
"~/Content/consola/plugins/animate-css/animate.css", //Referenced by @import
"~/Content/consola/plugins/bootstrap-select/css/bootstrap-select.css",
"~/Content/account/account.css",
"~/fonts/awesome/css/font-awesome.css",//Referenced by @import
"~/Content/consola/materialize.css", //Referenced by @import
"~/Content/consola/style.css"))
That eliminated almost all the errors.
The next thing I did was modify my css files changing css pseudo-classes syntax from this [type="checkbox"]:not(.filled-in, .gm-menu-hamburger) + label:after { to this one [type="checkbox"]:not(.filled-in) + label:after,
[type="checkbox"]:not(.gm-menu-hamburger) + label:after {
That solved all errors I had.
Hope that helps