Hi @Antoine-B,
I saw exactly this crash from another user yesterday. It looks, like there is something wrong with this plug-in. Please, get in touchw with Arturia support.
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PROGRESS 
With detailed guidance from Waves support I did a deep uninstall and clean (eg all the Roaming, AppData folders etc…) then reinstalled both Waves and Arturia MS-20. Happy to report they both work fine now, yay !
Thanks a lot @PaulWalmsley and @Martin.Jirsak for your support.
I’ll do my best to help some others too when I can. Enjoy the day !
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That’s great news, I’m very glad to hear it!
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I did have huge improvements to plugins crashing Cubase on my dual screen setup (the issue does not happen with the second monitor unplugged) thanks to @Fabio_B suggesting to kill the Nahimic Service (Win menu, Services, disable Nahimic).
Since then, very few major crashes.
There is still an issue with graphics somehow. 
On some songs, whenever I press G or H to zoom, or when the screen flips forward with AutoFollow, there is a major surge of Peak and it leads to big Dropouts.
I have a GeForce 1070 on an Alienware 17 R5 i9 laptop, using the Studio Drivers only, on Win 10. I would love pointers on how to improve this, thanks !
Sent you a PM.
I’ve had Cubase crashing straight on a song as soon as I press enter in the CMD window to create a dmp file with Procdump, this is the first file in the wetransfer.
Second one is on another song which does not crash when running Procdump but which gives me lots of dropouts when I do anything graphical on the second monitor, eg using G or H to change the zoom, or when the screen moves forward with F play follow.
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