The character creator has a lot of issues in the current release and preview that either make it difficult to use or impossible. In the preview it's still somewhat usable, but in release 1.20.80 it's completely broken.

Observed behavior in 1.20.80:

• Clicking on any character part attempts to load a store page (unsuccessfully) instead of selecting it, making it impossible to edit characters. Capes and emotes are also affected.
• A lot of items are missing across all categories, most noticeably capes and emotes.
• Button to see all skins doesn't work for custom packs.
• Classic skin is changed to persona when entering capes and emotes tabs.
• Persona isn't changed to classic skin when entering the classic skins tab.
• Character pieces no longer have colored square frames based on rarity and just look like marketplace items instead.
• The list of featured items is triplicated.
• Duplicate "My Characters" screen when navigating to it through the sidebar instead of the back button.
• Character is animated when entering any of the tabs or categories despite the "Screen Animations" setting being turned off.
• Persona no longer spins with a "Your character has been saved" message when exiting to the dressing room. Classic skins still behave normally.

The only thing that still works correctly is selecting and equipping classic skins. There is a workaround to edit characters though, at least partly.

Observed behavior in 1.21.0.23 Preview:

• A lot of items are missing across all categories, most noticeably capes and emotes.
• Classic skin is changed to persona when entering capes and emotes tabs.
• Persona isn't changed to classic skin when entering the classic skins tab.
• Unlocked achievement parts are usable, but still display a locked icon.
• Duplicate "My Characters" screen when navigating to it through the sidebar instead of the back button.
• Persona no longer spins with a "Your character has been saved" message when exiting to the dressing room. Classic skins still behave normally.