#505 BlockBall does no longer require Legacy Material support. This means BlockBall is considered a modern plugin in your plugin list now.
#505 The field effectingType is now called effectType in the arena.yml. Save your existing arenas to edit this field. If you are using the default value for this field, you do not have to do anything.
#505 Money rewards (Vault Integration) have been removed. Instead, directly execute vault commands using the command rewards.