I’m trying to upload modified Rekordbox playlist file into event history but it fails: “Playlist converting failed. Please file a bug report to Backstage.”
Link to playlist file: https://www.dropbox.com/s/b7vl220czgg3tq5/tiistaitantsut_011_biisit.txt?dl=0
This issue still persists. Tested two different playlists. Rekordbox version: 5.2.3
It took a while but this issue is now fixed. The problem was with the playlist file itself; it’s missing BPM column. As the underlying engine is used with request system too, it was assuming the bpm field. Anyways, it works now, but when you’re uploading playlistfiles to request system, make sure to have the BPM-column included 
Also, thanks for the bug report!