- Fix | Solved sounds not playing.
- Fix | Solved language keys still being used when set to empty or "none".
- Fix | Solved "Cannot invoke "String.contains(java.lang.CharSequence)" because "message" is null".
- Fix | Solved "Expected a list at X in plugins/CoreArena/data.yml, got ItemStack[] instead".
- Fix | Solved "Legacy formatting codes have been detected" when sending some messages in a frame layout.
- Improve | Added support for the new 1.21.4 material names.
- Fix | Solved "instance is marked non-null but is null" from underlying library issue.
- Fix | Solved "Potion Type must not be null" when saving items in arenas on legacy Minecraft versions.
- Fix | Solved "Cannot read the array length because "this.armor" is null" when storing arena items.
- New | Minecraft 1.21.4 compatible.
- Improve | No longer crashes on invalid world (such as when an arena was made on a world you have since deleted).
Stability and performance updates from the underlying library updates, for more details see https://github.com/kangarko/Foundation/commits/v7
