Error building app with appflow

Appflow
15

lets clearify errors
i have 2 problem 2 errors on appflow
remmember that both of them works fine my local these are error on appflow server

problem1:
error:ERR! code ELIFECYCLE

[19:30:43]: fastlane finished with errors
/usr/local/bundle/bin/fastlane: [!] Exit status of command 'npm run build' was 1 instead of 0. (FastlaneCore::Interface::FastlaneShellError)

> qrReader@0.0.1 build /builds/project-0
> ng build

Generating ES5 bundles for differential loading...
An unhandled exception occurred: [BABEL] /builds/project-0/www/0-es2015.js: Could not find plugin "proposal-numeric-separator". Ensure there is an entry in ./available-plugins.js for it. (While processing: "/builds/project-0/node_modules/@babel/preset-env/lib/index.js")
See "/tmp/ng-MJY2Zl/angular-errors.log" for further details.
npm ERR! code ELIFECYCLE
npm ERR! syscall spawn
npm ERR! file sh
npm ERR! errno ENOENT
npm ERR! qrReader@0.0.1 build: `ng build`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the qrReader@0.0.1 build 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/2020-03-25T19_30_42_975Z-debug.log

here is the package.json :https://github.com/itosoftco/qrscanner/blob/25f0eda4b9c58264b2a0f38495dc8ffeed395385/package.json

problem 2

i start new topic here about problem2 and if like answer there: