Versions
CraftBook version: 3.10.1;d29bd15
Bukkit version: Purpur version git-Purpur-579

Describe the bug

Creating [XP] sign throw error and block doesn't store dropped XP(s)
To Reproduce

1. Place block in config

XPStorer:
    require-bottle: true
    xp-per-bottle: 16
    block: minecraft:slime_block
    require-sneaking-state: 'no'
    radius-mode: true
    radius: 5

2. place sign [XP] this will throw error https://pastebin.com/CGK45GLW
3. drop xpbottle or kill mobs XP(s) wont get merge/collect b the block https://streamable.com/lbpwty

Expected behavior
xp-orbs get collect into the block

You have require-bottle set to true, which is why they aren't creating bottles when in radius mode. You need a chest above the slime block with empty bottles in it