There are known issues with Windows 10 and max number of dll’s that a process can open.
There is a good helper plugin to tell how much fiber local storage(FLS) you have left:
It sounds like you might be down to zero - from the default of 128.
It’s been a known issue for years now.
It’s been said Steinberg and others are working together with Microsoft on this, but no go so far it seems.
I have 99 free slots just opening Cubase, and with a full project usually down to 96 free with mostly Waves stuff, which thanks to their shell only use one slot not depending on how many plugins you use,