The error “cannot read properties of null (reading ‘scrollintoview’)” typically occurs when trying to access the property “scrollintoview” of a null value.

This error often happens when you are trying to scroll an element into view using JavaScript, but the element you are targeting does not exist or has not been properly selected.

Example:

Let’s say we have the following HTML structure:

    
      <div id="myElement">
        Some content...
      </div>
    
  

And we want to scroll the element with ID “myElement” into view using JavaScript:

    
      var element = document.getElementById('myElement');
      element.scrollIntoView();
    
  

If the element with ID “myElement” exists, it will be scrolled into view successfully. However, if the element does not exist or was not properly selected, the “null” value will be returned, and trying to access the “scrollintoview” property of null will result in the mentioned error.

To avoid this error, you should always make sure that the element you are targeting actually exists in the DOM and you have selected it correctly using the appropriate methods like getElementById, querySelector, etc.