ng serve fails for first commit

[miwo100]

the first commit fails with:

ERROR in Metadata version mismatch for module /Users/username/state_management_ngrx4/clientapp/node_modules/@ngrx/store/store.d.ts, found version 4, expected 3, resolving symbol AppModule in /Users/username/state_management_ngrx4/clientapp/src/app/app.module.ts, resolving symbol AppModule in /Users/username/state_management_ngrx4/clientapp/src/app/app.module.ts, resolving symbol AppModule in /Users/username/state_management_ngrx4/clientapp/src/app/app.module.ts