Since Windows 10 april update, starting Picard from code source in debug mode cause Picard to crash. it was working great before the update. Starting without debug is working as expected.
I must add my windows is configured with French language and locales.
I manage to locate the error source in picard/i18n.py, line 46
Updating update python to 3.6.5 and even 3.7beta did not solved the problem.
Steps to reproduce are simple, just start "python tagger.py -d" from command line, and you should get an error like this in the windows app logs (sorry for the french language):
I'm not sure it's a Picard bug, probably more a Windows or Python bug, but I thought you should get warned.
Should you need me to perform any changes in the code and test, I'd be happy to help.