checkbox No value accessor for form control with unspecified name attribute code example

Example 1: No value accessor for form control with unspecified name attribut

I fixed this error by adding the name="fieldName" ngDefaultControl 
attributes to the element that carries the [(ngModel)] attribute.

Example 2: ERROR Error: No value accessor for form control with unspecified name attribute

Add ngDefaultControl attribute to the element that carries the [(ngModel)] attribute.