unable to set an email signature | Carbonio CE

is there anyone here has successfully set an email signature on Carbonio CE?

I cant set the signature from the web client, when I click Save it says "signature information required", even though I already provided the information. Here is the pic: https://postimg.cc/Wtbvts1H

However, I can set the signature from the admin console but there is a catch, its always got the formatting wrong.

here is the pic of how I set the signature from the admin console: https://postimg.cc/bDqjxhHd

here is the signature when I try to compose an email: https://postimg.cc/XBJSPkPb

Is it a bug, or there is another way to properly set an email signature?

thank you