Is there a way to install a standard debian package instead of this snap stuff?

You are right, it is indeed some kind of permission issue but I don't know how to resolve it.
The files are on my secondary hard drive which are mounted to /data/.
If I copy my test file to the Desktop it works fine.

I tried this:
sudo snap connect filebot:removable-media


As well as ...

What is the value of $extractedPath when you call filebot ?

Use set -xu if you're not sure what you're doing:
set -xu


$extractedPath is the path to the directory ->/data/Downloads/Movies/Extracted/

What does set -xu do?

Odly enough I also tried to do this:
filebot -mediainfo /path/I/am ...

I updated to the newest filebot (4.7.9) and now filebot is not working for me anymore.
I installed it via snap. Before it was a standard apt-get package.

I always get this error:
Illegal Argument: java.nio.file.NoSuchFileException:

I call filebot like this:
filebot -rename -r "$extractedPath ...