indicator-sysmonitor can't work on linux mint 20.3 Cinnamon/MATE/xfce edition

[LittleFatHero]

indicator-sysmonitor can't work on linux mint 20.3 Cinnamon/MATE/xfce edition

[LittleFatHero]

indicator-sysmonitor version: V0.9.0

problem description:
I install indicator-sysmonitor on linux mint 20.3 using the following command:

sudo add-apt-repository ppa:fossfreedom/indicator-sysmonitor
sudo apt-get update
sudo apt-get install indicator-sysmonitor

and run the indicator-sysmonitor using the following command:

nohup indicator-sysmonitor &

it just can't work on my linux mint 20.3 desktop and can't display anything.
the error log is as follow:
"
(indicator-sysmonitor:2941): Gdk-CRITICAL **: 01:28:51.281: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
"

I have tried to install indicator-sysmonitor on linux mint 20.3 with desktop Cinnamon/MATE/XFCE, and the problem is the same and is still there.
so it seems that this problem has nothing to do with the desktop environment.
it seems like a bug on indicator-sysmonitor

[LittleFatHero]

hello , is there anyone know about this problem?

[fossfreedom]

It will need someone who uses linux mint to dig in and resolve. The basis of testing of this project is ubuntu budgie.