In my application ,I have stored uploaded images to folder ./assets/uploads. I am using easyimage and imagemagick for storing the images.
In my application, after up
I was using node version 10.15.0, and I faced same problem. I solved this by updating to current version of node(12.4.0) and also updated npm and all the node modules. After this, I fixed the vulnerabilities(just run 'npm audit fix') and the grunt error that was coming while uploading the images to assets/images folder was fixed.