Angular cli build prod: TypeError: Cannot read property 'kind' of undefined

Question

I try to build project with Angular CLI ng build --prod and I get this error:

ERROR in TypeError: Cannot read property \'kind\' of undefi

Answer 1

I ran in to this when I was using ng-recaptcha v6.0.2 with angular v6.2.2

For me, the fix was to set buildOptimizer to false in angular.json

"configurations": {
    "development": {
        "buildOptimizer": false
    }
}