Error: Cannot find module '../lib/theia' on macOS when I try to build and run the browser example:

[taiyivictor]

When I try to quick start a Theia browser example step by step. An error occurs when do 'yarn' command. (macOS: v10.15.3)

$ yarn run clean && yarn build
yarn run v1.22.4
$ theia clean
internal/modules/cjs/loader.js:638
throw err;
^

Error: Cannot find module '../lib/theia'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
at Function.Module._load (internal/modules/cjs/loader.js:562:25)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at Object. (/Users/taiyi/theia/dev-packages/cli/bin/theia:2:1)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

Appreciate some suggestions, thanks!

[vince-fugnitto]

@taiyivictor thank you for the question, before running the commands did you make sure to install the necessary prerequisites?

[taiyivictor]

Thanks for your reply. I have installed node.js/yarn/git. Detailed information are as follows:

wangdeMacBook-Pro:~ taiyi$ node -v
v10.20.1
wangdeMacBook-Pro:~ taiyi$ yarn -v
1.22.4
wangdeMacBook-Pro:~ taiyi$ git --version
git version 2.24.2 (Apple Git-127)
wangdeMacBook-Pro:~ taiyi$

[taiyivictor]

Hi Vincent, I might run the command in a wrong directory (theia/examples/browser/). When I change to ./theia, it works well. And theia run successfully:)