Plugin "null" could not be loaded, do you want to remove it from xfce4-panel configuration?

I have nethunter android tablet. I set up the local Kex server, when i start the KEX client I get this error: > **Plugin "null" could not be loaded, do you want to remove it from xfce4-panel configuration?** > > this plugin is in the current xfce4-panel configuration but could not > be loaded, probably due to an installation issue. I run those commands sudo apt install --reinstall xfce4-panel sudo apt install xfce4-goodies but the error still persists. Whereever I click on the screen opens the start menu