How to Clear Can’t bind to ‘formGroup’ since it isn’t a known property of ‘form’.

The full error looks like:  Can't bind to 'formGroup' since it isn't a known property of 'form'. <form [formGroup]="patientCategory"> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  src/app/select-option-default/select-option-default.component.ts:5:16  5   templateUrl: './select-option-default.component.html', ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Error occurs in the…

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