on “ionic serve” Schema validation failed with the following errors: Data path “.builders[‘app-shell’]” should have required property ‘class’. [ERROR] ng has unexpectedly closed (exit code 1). The Ionic CLI will exit. Please check any output above for error details. Ionic: ionic (Ionic CLI) …

I had the same issue which seems to have been caused by the @angular-devkit/build-angular node package as I have managed to resolve this issue by rolling back my back down from ^0.800.0 to ^0.12.4.

Schema validation failed ".builders['app-shell']" should have required property 'class'

Ionic Framework

ionicthemes June 3, 2019, 4:28pm 9

Change

"@angular-devkit/build-angular": "^0.800.0",

"@angular-devkit/build-angular": "^0.10.0",

2 Likes

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Schema validation failed ".builders['app-shell']" should have required property 'class'

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