Converter doesn't work

[LXK8]

I tried to convert an existing .BDF file to the new format.
After I select the file and click 'submit', the progress bar starts to move and after about 5 seconds it goes back to the converter screen and nothing else happens.
No download starts as described.
I tried several times with the same results.
Any hints?

[LXK8]

Never mind.
It appears that the converter does NOT like upper case letters.
Renamed my original file using lower case only and it converted fine.

[linus3368]

I've noticed that spaces in the file make for interesting returned files. Namely that the file is missing the extension. I haven't tried it lately, so hopefully that isn't a problem any more.