Snap-Ci concat.generated config error

[kevinchevallier]

Hey,
we're using grunt-contrib-concat on two projects running via snap-ci and on one of them i'm getting an error message during a build stage:

Running "concat:generated" (concat) task
Verifying property concat.generated exists in config...ERROR
>> Unable to process task.
Warning: Required config property "concat.generated" missing.� Use --force to continue.

The other project builds fine.
So far the only difference i could spot is the nodejs version 5.10.0 on the one with the error and 5.9.0 on the one ok. Don't really think that could be the cause. Both grunt files are identical as well as the grunt folders structure in the repos on github.

I know it's a long shot but if anyone has a clue, i'd love to hear it.
Thanks.

[NewtonJoshua]

Check your index.html.
This issue will happen if all the script src tags in your {{src}}/index.html is replaced, instead of your {{dist}}/index.html