Last week I ran into an issue with using mern-cli installed via Yarn. Many of the commands did not work, I researched the issue and found a similar issue and a respective solution regarding the Vue.js cli. As a result I submitted an issue along with a PR for you guys to review to see if we could get this resolved soon for other fellow Yarn users.

Issue: https://github.com/Hashnode/mern-cli/issues/21

PR: https://github.com/Hashnode/mern-cli/pull/22

I would love to get your feedback on this!

Cheers!