The machine name element "id" is defined before the source element "label"

I've set this to Critical because the module is unusable.

Hey @andreic,

I've tried to reproduce the issue by the steps proided in the description and had no luck

Can you please provide more info? Some trace of the error, or maybe the composer.json file (in that case I can test with your Drupal setup)
as it might affect on module functionality.

BR, Alex

Never mind. I was doing a ksort() on hook_form_alter() to find the form keys easier. Apparently that doesn't sit well with Form API.
All fixed.