Angular5 ,Angular7 updation ng serve throwing errors

Question

I have recently updated from angular 5 to angular 7. After updating, when I execute ng serve it shows some error... any body have the same issue ??

Schema validation failed with the following errors:
Data path ".builders['app-shell']" should have required property 'class'. Error: Schema validation failed with the following errors: Data path ".builders['app-shell']" should have required property 'class'. at MergeMapSubscriber._registry.compile.pipe.operators_1.concatMap.validatorResult [as project]

Answer 1

也更新所有相应的依赖项，然后重新安装节点模块。