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For windows 10 users, there is a fix for this:
" ...You can, however, try to do a clean reinstall of Unity by following these...
Is there a way to fix it with the new net 4.x script runtime? The net 3.5 switch fixes the issue but will that be viable for future updates?
So for some reason, after switching to unity 2018 (pretty sure it's the latest one) from unity 2017, starting tutorials/projects...