NoSuchMethodError: the Method 'toLowerCase' was called on null

[florian-sabonchi]

[ebrahim2222]

did you solve it ??

[Daliseiy]

This error occurs when you fail to pass in display as a property in your data. When passing your data, you need to provide two required properties id & display both are String. Example -

data: [
        {
          "id": "61as61fsa",
          "display": "fayeedP",
          "photo": "https://images.pexels.com/photos/220453/pexels-photo-220453.jpeg"
        },
      
      ],

Excluding id or display will cause an error which is what you are experiencing.