I have installed Droidcam On Xubuntu 20.04 LTS with this great tutorial.

After running Droidcam in terminal, I came across this error:

error while loading shared libraries: libappindicator3.so.1: cannot open shared object file: No such file or directory

>Solution :

So I searched libappindicator:

sudo apt search libappindicator

I just picked the most recent version and the error is gone:

sudo apt search libappindicator3-1