Please describe the problem:
I currently cannot synchronize all my directories (exept one or two) because the synchronisation start, et get freezed at a percentage. 

I ran conduit in command line to see the errors and I get this :
ProgrammingError: You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch your application to Unicode strings.

[Main                ][INFO   ] Setting global cancel flag (Main.py:305)
[Main                ][INFO   ] Stopping Synchronization threads (Main.py:309)
[Syncronization      ][WARNING] Conduit already in queue (alive: True) (Synchronization.py:77)
[Syncronization      ][WARNING] Cancelling thread (Synchronization.py:80)
Processus arrêté


Steps to reproduce:
1. run conduit
2. start a synchronisation
3. wait for freeze


Actual results:
synchronisation get freezed even if the program doesn't display any error in the GUI.

Expected results:
synchronisation reach 100%

Does this happen every time?
yes

Other information:
I use conduit v0.3.15