DSSI plugin window closes upon attempting to open

Hello,

Recently, I’ve encountered a problem I’ve never encountered before. When I load a DSSI plugin, it produces sounds, but its window is nowhere to be found. Upon clicking “External Editor,” absolutely nothing happens. So, I checked the Log.txt file made in “.renoise plugin server” and it contains this:

IPP: Detected CPU type: 0x21

Graphport: Initializing Freeimage...
Graphport: Initialising XThreads...
Graphport: Opening XDisplay ':0.0' (configured via 'DISPLAY' env)...
Graphport: XDisplay was successfully opened

GraphPort: Loading cursor images (libXcursor is present)...

System: Application path retrieved from /proc/self/exe: '/usr/local/share/renoise-3.2.1/AudioPluginServer_x86_64'
System: Running from directory '/usr/local/share/renoise-3.2.1/'...
System: Using '/usr/local/share/renoise-3.2.1/' as local resource directory...

GraphPort: Initializing the Font Engine...
GraphPort: Enumerating system fonts...

Graphport: Initializing Keyboard mappings...
Graphport: Initializing XAtoms...

Application: Initializing Icon Bitmaps...

Server: Connected

DSSI: Trying to instantiate /usr/lib/dssi/nekobee.so:nekobee...
DSSI: Found plug 'nekobee'...
DSSI: Instantiate OK

DssiWindow: Creating a new OSC server...
DssiWindow: Running the external DSSI executable...

System: Executing '/usr/lib/dssi/nekobee/nekobee_gtk osc.udp://127.0.0.1:14942/dssi nekobee nekobee nekobee'

DssiWindow: Closing the child DSSI executable...
DssiWindow: Closing the OSC server...

DssiWindow: Creating a new OSC server...
DssiWindow: Running the external DSSI executable...

System: Executing '/usr/lib/dssi/nekobee/nekobee_gtk osc.udp://127.0.0.1:14942/dssi nekobee nekobee nekobee'

DssiWindow: Closing the child DSSI executable...
DssiWindow: Closing the OSC server...

What I get from this is that the plugins load, but the plugin window itself simply closes upon being beckoned. How would I go about solving this?
I’m running Renoise v3.2.1 under Debian 10 “Buster” with the kxStudio repositories installed, if needed.

Thanks in advance,
dustboxednorth