Weird Cannot read property 'substring' error in grunt-contrib-less

sage
1

Hi there, I started doing some updates on an older project with the Roots 6.5.2 version and Grunt.
My javascript compiles fine, but when I change something in my assets/less/app.less file I suddenly get this weird error while running gulp watch:

Running "watch" task
Waiting...OK
>> File "assets/less/app.less" changed.

Running "less:dev" (less) task
>> SyntaxError: Cannot read property 'substring' of undefined in assets/less/app.less on line null, column 0:
>> 1 @import "bootstrap/bootstrap.less";
Warning: Error compiling assets/less/app.less Use --force to continue.

First line is just the default bootstrap import:
@import "bootstrap/bootstrap.less";

Tried removing node_modules folder and re-install with npm install, but still same error…
Any idea what might be causing this?

Thanks

2

Hmm, still not sure what’s causing this, but setting sourceMap to false in my Gruntfile did the trick.

3

hmm, not sure. Will be can’t find the location file of the CSS.