[BookWalker]

Originally Posted by Doitsu

It works fine on my machine.

Here are the instructions for the OP:

1. Locate the Sigl program folder (usually C:\Program Files\Sigil).
2. Press WIN+R, enter cmd and hit Enter to open a Command Prompt window.
   (Alternatively, seach for cmd in the Start menu.)
3. In the Command Prompt window, enter cd followed by the Sigil folder path. For example:
   cd C:\Program Files\Sigil
4. Paste python3 and hit Enter.
5. Paste import unicodedata and hit Enter

(It the Python3 interpreter works, you shouldn't get any error messages.)

When I perform 3. I get what's on the attached image.