A serious problem has occurred

When I select Edit instrument, in my case Groove Agent SE is Addielove drum kit and I then click on one of the pads that should generate a drum sound I get this message: A serious problem has occurred: please try to save your project under a different name. I don’t think it matters the kit, all of them seem to be broken when I do this.
I originally was always getting this message after I first upgraded, but then everything seemed to be working, but the problem is back again.

Cubase pro 9.5.0 Build 55 (64 bit) built on Oct 18, 2017. I have a PC running windows 10 OS. It won’t seem to let me attach the dump file.

I attached a picture showing the problem.

It seems to happen after I add a second instrument track and use a different drum kit. Am I only allowed to use one drum kit per project?

No, you can use as many as you want. You’ll have to zip the crash dump if you want to attach it.

I’ve attached a dump file.

Ok, now I’ve attached the crash dump zip file.
Cubase 64bit 2017.11.27 17.13.zip (213 KB)