I can't see any instruments, and get other weird UI behavior and crashes.

My ~/.zynaddsubfx-bank-cache.xml does get populated with them, but they don't show up in the UI, or something.

Version: 3.0.6

Sample Rate = 48000
Sound Buffer Size = 256 samples
Internal latency = 5.3 ms
ADsynth Oscil.Size = 1024 samples
liblo :-( 97-Address family not supported by protocol@socket()
lo server could not be started :-/
[INFO] Nio::start()
Starting Audio: JACK
Jack buffer resized
Audio Started
Starting MIDI: JACK
MIDI Started
[INFO] exec-after-init
[INFO] startup OSC
[INFO] UI calbacks
[INFO] OSC replay
[INFO] auto_save setup
[INFO] NSM Stuff
[INFO] LASH Stuff
[INFO] Launching Zyn-Fusion...
[INFO] Loading system libzest.so
[INFO:Zyn] setup_pugl()
[INFO] Main Loop...
[INFO:Zyn] zest_tick()
[INFO:Zyn] zest_open()
[INFO:Zyn] Found Assets at /usr/lib64/zynaddsubfx/
[INFO:Zyn] Starting Zyn-Fusion
[INFO:Zyn] Thanks for supporting the development of this project
[INFO:Zyn] Creating MRuby Interpreter...
[debug] parsing json file
[debug] json parsed succesfully
Time for a fast load is 4.812ms load(0.018) class(0.004) spawn(4.79)...
making reverse graph[1103]<3.251 ms>
[INFO:Zyn] zest_setup()
[DEBUG:Zyn] setting up animation fps

When I try to File > Load Instrument, nothing happens. If I click the headings (Folder, File) or the Enter button, that selection window simply closes.

If I try to use a mouse scrollwheel in the empty Folder or File lists, the program crashes:

trace (most recent call last):
[6] (unknown):0
[5] zyn-fusion-ui-src-3.0.6/src/mruby-widget-lib/mrblib/script.rb:702:in tick_events
[4] zyn-fusion-ui-src-3.0.6/src/mruby-widget-lib/mrblib/script.rb:415:in handle_events
[3] zyn-fusion-ui-src-3.0.6/mruby/mrblib/array.rb:17:in each
[2] zyn-fusion-ui-src-3.0.6/src/mruby-widget-lib/mrblib/script.rb:428:in handle_events
[1] zyn-fusion-ui-src-3.0.6/src/mruby-widget-lib/mrblib/script.rb:275:in handleScroll

zyn-fusion-ui-src-3.0.6/src/mruby-widget-lib/mrblib/fcache.rb:7335:in onScroll: undefined method 'length' (NoMethodError)

[FATAL ERROR] Mruby Is Unable To Continue

Btw, even though those lists don't show any text, the scroll bars can be slid, just showing empty rows.