Launch Grunt from Jenkins crashes. What could be the reason?

Question

JavaScript

In the Jenkins build, in the task, in the "run shell command" option, I specified:

cd /var/www/dev1/ 
bower update --allow-root
grunt --allow-root

The build fails with the following error in the logs:

[4mRunning "cssmin:build" (cssmin) task[24m
[33mWarning: Unable to write "css/application.css" file (Error code: EACCES). Use --force to continue.[39m

What could be the problem?

Answer 1

EACCES directly hints that there are not enough rights to create the output file.