clean-css-processor and autoprefix-processor conflict

[GuokrSun]

minify and autoprefix
Can't be used together

[brohhr]

I have the same problem when using latest version of less (3.0.2).
If I force install previous version of less (2.7.1) the error goes away.
¿Is there a way to use clean-css & autoprefix together with less 3?

[GuokrSun]

The package referenced by less2css is under node
So only modify the files in the less-plugin-autoprefix

[BarbzYHOOL]

Have you made autoprefix work in this plugin? me not @GuokrSun