regolith-control-center won't open

[ghost]

Just installed Regolith 2.1 on Linux Mint 21.0, and the Regolith Control Center/settings app won't open. Nothing at all happens when I try to start it from the launcher. When I start it from the terminal, this is what I get:

> regolith-control-center 
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel applications (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel bluetooth (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel color (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel datetime (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel default-apps (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel diagnostics (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel display (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel info-overview (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel keyboard (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel location (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel mouse (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel network (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel wifi (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel online-accounts (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel power (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel printers (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel region (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel removable-media (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.891: Ignoring broken panel sharing (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel sound (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel thunderbolt (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel universal-access (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel usage (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel user-accounts (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Ignoring broken panel wacom (missing desktop file)
** (regolith-control-center:250886): WARNING **: 21:13:58.892: Error in cc_shell_model_set_panel_visibility, unknown panel id: diagnostics
** (regolith-control-center:250886): ERROR **: 21:13:58.892: Fatal error in cc_shell_model_set_panel_visibility, unknown panel id: info-overview

Any ideas on how to fix this? Any ideas would be much appreciated.

[ghost]

It appears to be the same error as over here: #738