Got the following error, restarted Anki and things are going ok. I guess it's a problem with the progress announcement? :
Support/Anki/plugins/AnkiWarrior.py", line 20, in cardAnswered
calcExp(card)
File "/Users/xx/Library/Application Support/Anki/plugins/AnkiWarrior.py", line 81, in calcExp
checkSuccessAction(exp, newExp)
File "/Users/xx/Library/Application Support/Anki/plugins/AnkiWarrior.py", line 145, in checkSuccessAction
txt = "
BANZAI!!!
" % (success, city_jp)
TypeError: not all arguments converted during string formatting