I'm getting an error as "Unexpected token '.0' ". Suggest an alternate solution to solve this. As I'm getting the class as "parent 0-item".
.parent 0-item
  {
    pointer-events: none !important;
    cursor: default;
  }
I'm getting an error as "Unexpected token '.0' ". Suggest an alternate solution to solve this. As I'm getting the class as "parent 0-item".
.parent 0-item
  {
    pointer-events: none !important;
    cursor: default;
  }
 
    
    As per my understanding, you just receive the class name and have no control over the rendered HTML. If that's the case, then you can use an attribute selector.
[class='parent 0-item'] {
    pointer-events: none !important;
    cursor: default;
    color: red;
}<div class="parent 0-item">
    Hello World!
</div>