Problem with css minifier

[rikyperdana]

Sometimes when I run a meteor-kitchen example, it return this error

While minifying app stylesheet: path.js:8:11: Path must be a string. Received null at assertPath (path.js:8:11)

And it solved by doing this

meteor remove standard-minifier-css meteor add seba:minifiers-autoprefixer

Is it bug, or something?

[perak]

Never happens to me