Thanks.
You have non-ascii characters in your path of the sketchbook directory. As mentioned it's a known issue with IDE 2.x.
Option1
Create an Arduino directory outside your user directory. Next change the sketchbook directory in File → Preferences to that new directory.
Option 2
Create another user account (e.g. anonymouslynig) and use that for your Arduino development (or for everything).
Note
This does not explain why you have a problem in IDE 1.x.