Angular 12 - TypeError: Cannot read properties of null (reading 'writeValue')

Angular 12 - TypeError: Cannot read properties of null (reading 'writeValue')

I'm creating a generic text input component, everything works well while serving the project, but in the built project I get this error:

TypeError: Cannot read properties of null (reading 'writeValue')
​

HTML:

<div class="p-field">
<label>{{label}} <span class="p-error">{{checkRequired(ngControl.control) ? '*' : ''}}</span></label>
<input class="full-width" [type]="type" pInputText [formControl]="ngControl.control">

<small *ngIf="ngControl.control.touched && ngControl.control.errors?.required" class="p-error">{{label}} is required</small>


<small *ngIf="ngControl.control.errors?.minlength" class="p-error">
{{label}} must be at least {{ngControl.control.errors.minlength['requiredLength']}}
</small>

<small *ngIf="ngControl.control.errors?.maxlength" class="p-error">
{{label}} must be at most {{ngControl.control.errors.maxlength['requiredLength']}}
</small>
<small *ngIf="ngControl.control.errors?.email" class="p-error">
This email is not valid
</small>

<small *ngIf="ngControl.control.errors?.isMatching" class="p-error">Passwords do not match</small>
</div>


component.ts

import { Component, Input, OnInit, Self } from '@angular/core';
import {AbstractControl, ControlValueAccessor, NgControl} from '@angular/forms';

@Component({
selector: 'app-text-input',
templateUrl: './text-input.component.html',
styleUrls: ['./text-input.component.css']
})
export class TextInputComponent implements ControlValueAccessor {
@Input() label: string;
@Input() type = 'text';

constructor(@Self() public ngControl: NgControl) {
this.ngControl.valueAccessor = this;
}

checkRequired(control) {
if (control.validator) {
const validator = control.validator({} as AbstractControl);
if (validator && validator.required) {
return true;
}
}
}

writeValue(obj: any): void {
}

registerOnChange(fn: any): void {
}

registerOnTouched(fn: any): void {
}

}



Angular info:

Angular CLI: 12.2.6 Node: 14.17.3 Package Manager: npm 6.14.13 OS: win32 x64 Angular: 12.2.6

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