Steps to reproduce:

1. Create a host without agent interface
2. Open host wizard for that host
3. Select template with Agent
4. Proceed to Host wizard's agent setup page

Result:
Infinite loading, error in console:

Uncaught (in promise) TypeError: Cannot read properties of null (reading 'id')
    at #updateForm (<anonymous>:1234:52)
    at #gotoStep (<anonymous>:455:19)
    at <anonymous>:315:20

See screenshot:

Expected:
Agent setup page should be working as expected