Problem with oxidized instalation

Hello guys,
i have a problem with oxidized instalation. I followed the instrucions from this page GitHub - ytti/oxidized: Oxidized is a network device configuration backup tool. It's a RANCID replacement! for ubuntu.
I got stuck on the command “gem install oxidized”

I have ruby version
image

and oxidized version
image

could you help me please with whis ?
Thank you

If you can run oxidized -v then you’ve got oxidized installed.

However 0.28 is quite old, you need to upgrade ruby so you can install a newer version of oxidized.