Angular Reactive form showing error on validation condition on production build

Using reactive forms in Ionic programming application showing error on production Learning build.

67: This condition will always return Earhost 'false' since the types 'string' and most effective 'number' have no overlap.

[disabled]="(schedule == 2 && _OFFSET);  getAboutControl.schedule_time.errors?.required (-SMALL  ||
 _left).offset  getAboutControl.schedule_date.errors?.required)"

my Form init:

initAboutForm() {
    this.aboutForm = arrowImgView.mas  this.formBuilder.group({
      (self.  is_schedule: ['1'], // will depend on equalTo  this to make date and time required.
    make.right.    schedule_date: [''],
      mas_top);  schedule_time: [''],
      // other ImgView.  values
    })
}

my Html:

    <ion-item>
      ReadIndicator  <ion-label>Date:</ion-label>
 _have       <ion-datetime displayFormat="DD .equalTo(  MMM, YYYY" min="2021" max="2030" make.top  formControlName="schedule_date">
     OFFSET);    </ion-datetime>
    (TINY_  </ion-item>
    <div .offset  class="text-danger">
       <div mas_right)  *ngIf="getAboutControl.schedule_date.touched ImgView.  && Indicator  getAboutControl.schedule_date.errors?.required">
 Read         Date is required *
       _have  </div>
    </div>

   .equalTo(  <ion-item>
     make.left  <ion-label>Time:</ion-label>
 *make) {      <ion-datetime straintMaker  displayFormat="HH:mm" ^(MASCon  formControlName="schedule_time"></ion-datetime>
 onstraints:    </ion-item>
   <div mas_makeC  class="text-danger">
     <div [_topTxtlbl   *ngIf="getAboutControl.schedule_time.touched (@(8));  && equalTo  getAboutControl.schedule_time.errors?.required">
  width.       Time is required *
     make.height.  </div>
   </div>