Problem facing During execute aws-companion

I have facing following issue during executing the aws-companion example even i have installed all the dependency for Uppy and for aws-companion as well. All environment variable are set for AWS.
Error received during execute the example.

root@nodejs ~/uppy-master# npm run example aws-companion

uppy-build@0.0.0 example /root/uppy-master
node bin/run-example “aws-companion”

@uppy-example/aws-companion@ start /root/uppy-master/examples/aws-companion
npm-run-all --serial copy --parallel start:*

@uppy-example/aws-companion@ copy /root/uppy-master/examples/aws-companion
cp …/…/packages/uppy/dist/uppy.min.css .

cp: cannot stat ‘…/…/packages/uppy/dist/uppy.min.css’: No such file or directory
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @uppy-example/aws-companion@ copy: cp ../../packages/uppy/dist/uppy.min.css .
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @uppy-example/aws-companion@ copy script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2020-08-21T12_51_48_559Z-debug.log
ERROR: “copy” exited with 1.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! @uppy-example/aws-companion@ start: npm-run-all --serial copy --parallel start:*
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @uppy-example/aws-companion@ start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2020-08-21T12_51_48_590Z-debug.log
child_process.js:644
throw err;
^

Error: Command failed: npm start
at checkExecSyncError (child_process.js:601:13)
at execSync (child_process.js:641:13)
at Object. (/root/uppy-master/bin/run-example.js:29:1)
at Module._compile (module.js:652:30)
at Object.Module._extensions…js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Function.Module.runMain (module.js:693:10)
at startup (bootstrap_node.js:191:16)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! uppy-build@0.0.0 example: node bin/run-example "aws-companion"
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the uppy-build@0.0.0 example script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2020-08-21T12_51_48_615Z-debug.log