Sage 8.5 wiredep error

I built the main setup with just the Bootstrap 3.3.7 files to start with ,which was OK, but after adding a few dependencies to Bower and installing them, I get an error on gulp, seems to be with wiredep, as below,

Error: must provide pattern
at new GlobSync (/var/www/
at Function.globSync [as sync] (/var/www/
at /var/www/

I found where iwiredepis returning less and sass files and it seems to fail on that.

Any tips welcome, Thanks