According to this link (which is written for older ASP.NET), "It is not necessary for ASP.NET Core, because application is exposed by a console application that it already always on." Could there be another reason for the problems we are having?
Do you have a link as to how that can be done in Core?
Thanks. I'm unclear how I would incorporate this with a call of the following form (which automatically unblocks the page when the promise is completed):
abp.ui.setBusy(
$('#MyLoginForm'),
abp.ajax({ ... })
);