Traktor, Serato, Rekordbox and iTunes libraries are on an external drive. When I drop a playlist from one of the libraries on the external drives, it works. But if I drop a playlist from the local Serato library or the Rekord Buddy library (which is also local I guess), then it crashes Rekord Buddy.
MacBook Air with 10.14.6
Rekord buddy Beta 649
Serato DJ Pro 2.2.3
Rekordbox 5.7
Traktor 3.2