Nice Hotel but as a designer I only see bad copies of the Frontend-Design from Habbox.fr and many other designs from the years 2016-2020 with some color changes.
I wish you good luck "mein Bro", xEpicFail. ;)
Maybe I'm wrong, I've never used AtomCMS or else but I guess you need to use your Server IP or Domain, like
https://DOMAIN/usercontent/badgeparts
https://DOMAIN/usercontent/badgeparts/generated
I know Lucas now not so long, however, as it is presented here, is not his real personality but his kind of "fun", he and I are not far from each other in terms of humor.
Who can not understand fun, sarcasm and irony should nowadays anyway no longer play Habbo, because many users even including...
I don't enter Hive yet but maybe "image-rendering: pixelated;" in your css could work to get pixelated images working. On my Macbook is it important to use.
Habbo Downloader to rip a Text File and renaming it to .json?
Way faster go to http://habbo.nl/gamedata/external_flash_texts/0 press STRG + S, save it on your desktop or what ever, right click, rename and change .txt to .json. Done.
Look at the post above.
And your client problem is maybe cuz wrong Paths or not setted Auth Ticket. Check your Source Code on your client and the Auth Ticket need to match with your Database and the Client.
Noone can rip the folder 100%, it must be possible to call up files which have been deposited by Habbo himself in some way, such as the badges. So if there is no path to an existing folder, e.g. to "test", you can't rip anything and there is no "proof" that this folder exists on the server.