Openssl error installing quickbox

i have been trying to install quickbox tried 3 times now on clean server
keep getting this error

Pulling QuickBox Ecosystem … [ DONE ]
Updating system … [ DONE ]
Installing all needed dependencies … [ DONE ]
Installing openssl … /etc/QuickBox/setup/quickbox-setup: line 499: bc: command not found
Building ffmpeg from source for screenshots … [|] /etc/QuickBox/setup/quickbox-setup: line 596: bc: command not found
any ideas as i have reinstalled the os 3 times and tried 3 times to install but keep getting this error