If I hit the "Reload Scripts" command in the most recent blender snap
latest/stable: 2.90.1 2020-09-23 (47) 187MB classic
I get this cryptic error message:
File "<string>", line 1 def fn(): ^ SyntaxError: invalid syntax location: <unknown location>:-1 location: <unknown location>:-1
This happens regardless of which .blend-file I open up and which Addons are within my load order.
This does not happen on the older
2.83lts/stable: 2.83.6 2020-09-09 (46) 170MB classic
I managed to reproduce this error also in the (Linux) binary that can be downloaded from Blender's homepage.