What do the logs say?

if you run “PM2 logs” should give you an idea of what may be happening.

It seems you have Yarn installed using npm, in which case /usr/local/bin/yarn will link to the node script yarn.js (as defined in its package.json) and not the bash script yarn. So bash yarn start (what you are essentially doing) won’t work.

Try this instead, without interpreter:

pm2 start yarn –name test – start