Nice to see VEPro allowing VST3!
Although I didn't have any crash so far with my Kontakt instances, I noticed that they seem to not be working once I reload a project file. The first time they work fine, it's only after reloading it that the issue starts - that said, it's not on every instance and/or instrument, which is really weird...
Reapplied Kontakt VST2 version again, and they're back to normal.
Windows 11 Pro, Cubase 12 Pro and AMD Ryzen 3700x with 64Gb RAM.
I also noticed that EW Play engine is not recognized as a VST3.
Now with effects, I haven't noticed any issue beside some plugins being hard to recognize the first time.
In any case, it's a nice welcome to VEPro! Hope you can sort things out with time :)