AdvancedPlayTime [1.21 - 1.21.10]

What's Changed

Fixes

• Fixed ConcurrentModificationException error after reloading the server.
• Now if the player is not found in the placeholder, it will return null (the placeholder will not be applied).

Improvements

• Performance and code improvements.
• Now if the player spent time is zero or negative (in small cases), it will return "<1s".
• Added check if the player has opened chest type inventory while closing all player's inventories.