Please check the attached screenshot. When you hover the mouse on button ‘Sign in with domain account’, the cursor is IBeam, not Pointer. It’s supposed to be a Pointer.
Thanks for bringing this to our attention!
We have created an issue to get this fixed so that a pointer appears on hover.
If you would like to track the issue you can view it here: https://github.com/OctopusDeploy/Issues/issues/3215