Hey,
after the update i did tonight, Mate-Tweak seems not to be working anymore.
I typed "mate-tweak" in a shell and i found this : jonathan@solus ~ $ mate-tweak
Traceback (most recent call last):
File "/usr/bin/mate-tweak", line 22, in <module>
import distro
ModuleNotFoundError: No module named 'distro'
Something to do ?