SSMS Object Explorer Exception

So I just signed in this morning and opened SSMS 2017. I get this message:
An exception was encountered while constructing the content of this frame...
Details: the located assembly's manifest definition does not match the assembly reference.
Plus a few more details...
It worked fine last night, any ideas?

Also, do we have a category for SSMS?


I closed it and re-opened, and now I can connect to the server and it seems to work fine so far.


Well, it keeps happening, seems like every other time I open it.