Error when adding child

[drizzt09]

Describe the bug
when adding child name and code I get error

To Reproduce
Steps to reproduce the behavior:

1. Install app on both devices
2. Setup parent account on parent device and login
3. Sign into same parent account on child device (choosing as child device).
4. Child device asks for name and key
5. Add child on parent device and get key
6. Add name and key to child device and submit.
   Error.

Expected behavior
Expect child device to activate but fails

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS:
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device:parent pixel 7 pro (os14), child gamaxy s9(os10)
• OS: [e.g. iOS8.1]

Additional context
Error: type 'Null' is not a subtype of type 'String' in type cast.

[JordyHers]

There is currently an issue. The image is also somehow mandatory. Please make sure you have added a dummy image to the child. @drizzt09