Help with prime G2 hardware revision D

[GSL007]

Hello everyone, my name is Gary.

I'm brand new here that have long been a fan of HP calculators. They are all I have used. Currently I have a business/financial calculator and an HP 35S.

Yesterday I purchased a Prime and I have a problem I can't fix.

Hardware revision D
Software version 2.1 .14730 (2023 04 13)

I used the HP connectivity software to update the firmware.

It's so different from anything else. And I'm a total novice with it.

When I do a calculation and then save the homepage (Save Stack) and then I go to Load what I've saved (Load Stack) the Prime crashes and reboots. The only message i can see is that it's had a problem. Am i doing something wrong? Is it a known bug?

Any help would be gratefully received.

By way of introduction, I am 63 and have been using HP calculators since I was in my early 20s. I've tried a few others like TI and I just don't think anything matches HP for their user interface, build, a wonderful keys. It's been sad watching HP give away this business.