Mat-Stepper Error in angular material.

core.js:4002 ERROR Error: Uncaught (in promise): Error: Template parse errors:
'mat-horizontal-stepper' is not a known element:

1. If 'mat-horizontal-stepper' is an Angular component, then verify that it is part of this module.
2. If 'mat-horizontal-stepper' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("

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"): ng:///AdminLayoutModule/FillDetailsComponent.html@121:0
Error: Template parse errors:
'mat-horizontal-stepper' is not a known element:

1. If 'mat-horizontal-stepper' is an Angular component, then verify that it is part of this module.
2. If 'mat-horizontal-stepper' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("

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