error in less

[Amenocy]

hi ,
i installed and configured but app ,return this error
500 Error: Invalid mapping: {"generated":{"line":487,"column":2},"source":"/Users/Amin/expg/public/css/vendor/bootstrap/type.less","original":{"line":1,"column":null},"name":null}

[chrislewispac]

this just popped up yesterday or today and I think must be a result of an update in a node_module dependency version

[chrislewispac]

appears related to this. less/less.js#2896

For now change in package.json

"less": "^2.5.1"  -> to ->    "less": "2.5.1",