SUMMARY
I can't manage to open a specific file from file manager or command line

STEPS TO REPRODUCE
1. from command line I launch
[code]$ juk file.mp3[/code]
or
[code]$ juk "file.mp3"[/code]
or
[code]$ juk "file.mp3"[/code]
or
right clicking on the file manager on an mp3 file > open with > juk


OBSERVED RESULT
juk only opens up without playing any file. the only output I get from the cli is
[code]Icon theme "Vibrancy-Light-Teal" not found. qt.svg: Duplicate unique style id: "radialGradient8574"[/code]

EXPECTED RESULT
Juk starts up and begins to play the specified file

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Kubuntu 19.10
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.4

ADDITIONAL INFORMATION
if Juk is already open when I launch the single file, it opens up another instance;
Same result in kubuntu and lubuntu 19.10
Juk version is actually 19.04.3