Rekordbox crash everytime.please help

 Hi,i have new clean system os x sierra(not high sierra). We have mac 2017 (the highest version) and ddj rzx. If i open rekordbox,everythink is ok,but if i put some music from itunes or from usb,downloands,deskopt, rekordbox immediately crash.

but i dont understand. First day when i install os sierra,everything was ok. I play all night withou any problem. After party i turn off rekordbox,ddj rzx,mac.

I start mac next day(night) and we have this problem (still os sierra,because i have disable update)