Cubase 9.5 Artist frequently crashing

Hi,
I’m fairly new to using Cubase but I’ve been having issues with it crashing. It seems to happen when I add a VST Instrument track - it works fine for a while, then the screen freezes (although I can still play the instrument) then after a while longer it crashes and I get an error message and a dmp file. It is particularly an issue with Halion 6 but other plugins have the same problem. I am running Cubase from an external SSD. Could that be an issue? Any advice would be much appreciated!

Hi,

Could you share any of the crash dump file(s), please?