Install help

I'm trying to install FR24 to a raspberry pi.

Used the following command to try to load the software which I copied from this forum- (less the comma, first 4 posts limitation)

sudo bash -c "$(wget -O - h,ttp://repo.feed.flightradar24.com/install_fr24_rpi.sh)"

Comes back with grp: no valid OpenPGP data found.

help....