Angular: Cannot read property 'call' of undefined (when bootstrapping)

Question

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I have a service that throws an error while the app is bootstrapping. Cannot read property \'call\' of undefined. I\'m u

Answer 1

I think it happens when you make changes to module imports during run time.

Run the application again using ng serve and it fixed the issue for me.

It may also occur when you try to use components of lazy loaded modules in other modules before the lazy module getting loaded or such similar scenarios.