CoreArena - Physical Engine Mob Arenas v4.9.6

• Fix | Changed {<arenaname>_remaining_lobby} to {<arenaname>_remaininglobby} to prevent it being categorized as a player variable.

• New | Added {corearena_ARENA_remaining_lobby} PlaceholderAPI variable to show remaining lobby time.
• New | Added {corearena_is_in_lobby} PlaceholderAPI variable that returns "yes" or "no" depending if the player is in an arena lobby waiting for the game to start.

• Fix | Solved pagged menu issues on legacy Minecraft versions.
• Fix | Solved class items not being properly saved due to an underlying library update.
• Fix | Corrected "Clone Tool is ON but lacks a spawner point" and replaced with a proper error message saying that the original spawnpoint block has been removed.
  

• Fix | Solved "expected class, got interface" error in GUI for legacy Minecraft versions.
  • Afaik Spigot is making breaking changes without mention. I am not blaming Spigot for attempts at modernizing the API, I am just saddened it happened without a proper announcement as this is a big change breaking all plugins calling inventory view for Minecraft 1.20 and older using 1.21 API.
  • I am committed to keep supporting 1.7.10+ as it is very easy (contrary to other claims).

• Improve | Added Minecraft 1.21 compatibility.
• Fix | Solved "Only deserialize a list of maps, not class Object[]" issue when creating monster spawners.
  

• Improve | Performance improvements thanks to underlying library update.

• Improve | Certain portions of this plugin lets administrators configure commands to be dispatched at console-level privileges. We now automatically filter commands most used for abuse such as /op to catch future exploits and vulnerabilities.

• Improve | Support Spigot 1.20.6 and Paper 1.20.5/6.
• Improve | The Disable_Health_Regen arena option now lets players still regenerate health by drinking instant heal potions.