Login fails due to value "identity"

After changing my formerly successful login form to bind a field this way I get this report from Dev tools.

JSON. identity : 200

Which is the correct value I want to be bound to that input.
But using the code below stops the page from being processed in the browser. After submitting the login to the form page the Submit button is clicked but the form itself is not loaded.

If I change this form input back to a select dropdown the page renders.
So the biggest change with the form I modified is this code.

 <input type="text" class="form-control" id="inp_story_collector" name="story_collector" dmx-bind:value="identity">

Should this code be written differently in the bind value?