Comment 1 for bug 72452

I experience the same behaviour. The slgui window shows up all black with a few dark grey boxes, then stays that way. stdout shows:

slgui: our URL is osc.udp://localhost.localdomain:19596/
I/O warning : failed to load external entity "/home/roger/.sooperlooper/gui_config.xml"
Error loading config at /home/roger/.sooperlooper/gui_config.xml!
execing: 'sooperlooper -q -U osc.udp://localhost.localdomain:19596/ -p 9951 -l 1 -c 2 -t 40 -m "/home/roger/.sooperlooper/default_midi.slb"'

slgui: spawned new engine
slgui: remote looper is at osc.udp://localhost.localdomain:9951/ version=1.0.8c loopcount=1
sooperlooper warning: could not open for reading: /home/roger/.sooperlooper/default_midi.slb