An unhandled exception occurred: Job name “..getProjectMetadata” does not exist.
It seems to be a problem with @angular-devkit/build-angular.
Try updating it by running
npm i @angular-devkit/build-angular
Or downgrading it by specifying a previous version, such as
npm i @angular-devkit/build-angular@0.803.24
source:
https://stackoverflow.com/questions/59447679/an-unhandled-exception-occurred-job-name-getprojectmetadata-does-not-exist