This question as well as the original question are easily answered through a simple Google search. Please do a little bit of research before posting here - in most cases that will also be a lot faster than getting help here.
First article I found on Google...
Seems @Higoka has made a tool that can download you the latest clothes and useful data from Habbo itself. Give that a try: https://github.com/higoka/habbo-downloader .
It is looking for a bot_frank column in your users table in your database. You are either using a wrong database or need to import the necessary sqls that followed with a plugin that you have potentially installed.
This isn't really what he requested. This font isn't found on the font-generator either.
OT: You can find this font on this thread: https://devbest.com/threads/new-modern-clean-habbo-font-new.32304/ .
Edit: Not the exact same font. You can ask the owner of Hablush where it's found.
I think it is compatible with Plus, but you can easily modify a few queries to make it pair up with any emulator. I'd recommend not using Rev and look for something newer like Comet or Goldfish.
Think you'll be alright considering this "edit" appears to just be an existing Rev theme with slightly changed colors and images. Still a shame that there are toxicity in this scene and I recommend not giving access to important files to anyone at first glance.
This is just the method for user registration. Please post the code that renders your register form (assuming that is where the error is seen). I think it'll be your register.php. This is most likely where you'll find the variable that is undefined.
If it's not coded into the emulator you'd have to do it yourself or pay someone to do it for you. Other option is to find an emulator that already has it - I think Arcturus/MS does but I'm not exacly sure.