I have Odoo 10 installed on a CentOS 7 box. I am currently getting the error:

Could not execute command `/usr/local/bin/lessc`

I have installed `less` and the `less-plugin-clean-css`

sudo npm install -g less less-plugin-clean-css

When I try `which lessc` I get:

/usr/local/bin/lessc

I have tried installing and removing the blog module.

I have tried getting in the database and deleting all the assets:

delete from ir_attachment where name like '%asset%';

I have tried rebooting odoo, nginx and the whole server.

The site is basically unusable without the stylesheets. How can I get `lessc` to work on CentOS 7?