It was not possible to install plugin on Debian Jessie 64bit.

Error message:
Ett problem uppstod vid körning av efterinstallationssteget. Installationen har kanske inte slutförts korrekt
Det gick inte att köra /home/per/ArduinoCreateAgent-1.1/Arduino_Create_Bridge -generateCert=true : /home/per/ArduinoCreateAgent-1.1/Arduino_Create_Bridge: error while loading shared libraries: libappindicator3.so.1: cannot open shared object file: No such file or directory

Hi perz,
you need to install libappindicator (which is preinstalled on Ubuntu but probably not in your distro).
Sorry for the inconvenience