NullInjectorError：没有 MatDialog 的提供者！ 使用带有垫子对话框的防护时显示错误

Question

I have an error:

VM654 vendor.js:29876 ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(AccountsModule)[CreateAccountGuard -> CreateAccountGuard -> CreateAccountGuard -> ModalService -> MatDialog -> MatDialog -> MatDialog]:   NullInjectorError: No provider for MatDialog!

I do not get what is wrong and why I see it.

Basically, in CreateAccountGuard (which is in Accounts Module) I use Modal service to open confirmation modal.

Confirmation modal component and ModalService are in another module - Modals module. I have added Confirmation modal component to declarations and entryComponents. MatDialogModule is also added there in imports.

While running Jasmine test - no issues. But on the website - I see this error.

Unfortunately, cannot share the code. Maybe you have any ideas what to do from here?

Answer 1

The issue was related to the fact that I was adding MatDialog module to the Modals module (My feature one).

I have added it to imports in the app.module and it worked.