Need help with building ide

Guys I am pretty new to software development now what i want is to build theia so I am following the tutorial on theia’s website now whenever I type yarn theia build it gives error that it cannot find theia I have followed all the previous instructions and my node.js version is the latest one

[original thread by Arijit265]

It would be enough to ask once, please be patient. How is the holiday season.