TiddlyDesktop v0.0.9 won't save changes - "Internal Javascript Error"

[ingm...@gmail.com]

I'm just starting out with TiddlyWiki and TiddlyDesktop.

I downloaded an empty wiki, changed the name of the wiki in the browser and saved it. Worked fine.
Then I opened the same file in TiddlyDesktop, added a new tiddler and tried to save it, but I just get this error message each time:

I have no idea what might be wrong, so any help is welcome, because as of right now, I can't use TiddlyDesktop at all...

[ingm...@gmail.com]

I think I've worked around the issue, which was somehow caused by the directory and the name of the parent folder (maybe certain characters) of the tiddlywiki file.