It appears that Cinnamon crashes on startup for some reason. I have disabled all the desklets/applets but it keeps crashing on startup. It does, however, work if after the crash I restart Cinnamon (both with and without disabling the applets/desklets).
I have pulled the output of ~/.xsession-errors to privatebin:
-Thanks 
Whenever I start to experience crashes, the first thing I always do is test at least three alternate kernels.
The ones I usually test (in order) are:
linux-lts
linux
linux-rt
Don't forget to install the corresponding headers for each kernel you install.
I would also look for and install your missing smartcard driver and test alternate themes.
Thanks for the feedback. I tried booting up the lts-kernel but I get an error with LDM.
The problem seems to have solved itself today, after installing some updates…
I saw that, but I don’t know why it’s telling me that - I don’t have a smartcard reader 