I am so frustrated as I am having the same problem. I am not sure when it started, sometime in April or May 2020.
I read posts on doing repair and that did not help.
I do not want to lose any photos stored, remove prior Windows updates or reinstall the app.
My import option is defaulted to none and I can select "import all photos" or "none". If I select the
'items since last import", it freezes and then closes.
So I have to individually select photos.
I think it knows the number since last import as I see it may say "116 photos to import out of 1600" but it does not
select the 116. If I click on import 116 0f 1600 message, it imports 0 since none are selected.
I hope if enough people complain Windows will fix this in a future update when it was most likely caused by some
update that was automatically done.
I have iphone 8 plus, Windows 10 in Dell Inspiron 1500 series.
Thanks
Diane