According to the Samsung Good Lock developers, Theme Park for Samsung Keyboard app themes are not working on One UI 6. The issue is linked to a bug with the One UI 6 colour palette that is affecting Good Lock’s ability to create themes for the Samsung keyboard.
Samsung keyboard has a bug with themes on One UI 6
The developers of Good Lock have confirmed that they will release a fix for the problem in a future update, but in the meantime, the only solution is to disable the color palette functionality.
Just visit the system settings, click on “Background and style”, then “Color palette” and finally the switch to disable the functionality.
Once this is done, simply go back to the Theme Park app and re-apply the keyboard theme you want to use
For your information, Samsung Good Lock is an application that allows users to customize the appearance of the interface of their Samsung smartphone and also certain features such as notifications, lock screen, wallpapers, keyboard, themes and more through special modules.
Samsung Good Lock impacts many aspects of system-level software, so any changes made to the app should be thoroughly tested.
Theme Park is a service to create a theme and install it quickly and easily.
It extracts dominant colors from wallpaper and creates theme automatically based on user’s style and the colors. Users can see the final appearance from preview screens. Create your own theme that can express your personality!