Hi the addon is not working with the following Lua error :

17x SweepyBoop/Core.lua:2: attempt to call global 'GetAddOnMetadata' (a nil value)
[string "@SweepyBoop/Core.lua"]:2: in main chunk

Locals:
addonName = "SweepyBoop"
NS =

{
NAME_PLATE_UNIT_REMOVED = "NAME_PLATE_UNIT_REMOVED"
SPECID = {
}
spellResets = {
}
SPELL_SUMMON = "SPELL_SUMMON"
MAGE = "MAGE"
UNIT_MAXPOWER = "UNIT_MAXPOWER"
cooldownSpells = {
}
DEFAULT_ICON_SIZE = 32
ARENA_PREP_OPPONENT_SPECIALIZATIONS = "ARENA_PREP_OPPONENT_SPECIALIZATIONS"
isTestMode = false
UNIT_MAXHEALTH = "UNIT_MAXHEALTH"
MONK = "MONK"
UNIT_POWER_FREQUENT = "UNIT_POWER_FREQUENT"
UPDATE_SHAPESHIFT_FORM = "UPDATE_SHAPESHIFT_FORM"
UNIT_SPELLCAST_SUCCEEDED = "UNIT_SPELLCAST_SUCCEEDED"
PLAYER_SPECIALIZATION_CHANGED = "PLAYER_SPECIALIZATION_CHANGED"
SPELL_EMPOWER_END = "SPELL_EMPOWER_END"
PARTY_KILL = "PARTY_KILL"
UNIT_HEALTH = "UNIT_HEALTH"
WARLOCK = "WARLOCK"
DEMONHUNTER = "DEMONHUNTER"
SPELL_AURA_APPLIED = "SPELL_AURA_APPLIED"
PLAYER_TARGET_CHANGED = "PLAYER_TARGET_CHANGED"
SPELL_DISPEL = "SPELL_DISPEL"
SPELL_AURA_REMOVED = "SPELL_AURA_REMOVED"
SPELL_CAST_START = "SPELL_CAST_START"
RESET_FULL = 0
LOSS_OF_CONTROL_UPDATE = "LOSS_OF_CONTROL_UPDATE"
HIDETIMEROMNICC = "BoopHideTimer"
BAG_UPDATE = "BAG_UPDATE"
WARRIOR = "WARRIOR"
SHAMAN = "SHAMAN"
GROUP_ROSTER_UPDATE = "GROUP_ROSTER_UPDATE"
ROGUE = "ROGUE"
SPELL_DAMAGE = "SPELL_DAMAGE"
PLAYER_REGEN_ENABLED = "PLAYER_REGEN_ENABLED"
PALADIN = "PALADIN"
HUNTER = "HUNTER"
UNIT_AURA = "UNIT_AURA"
EVOKER = "EVOKER"
DEATHKNIGHT = "DEATHKNIGHT"
DRUID = "DRUID"
SPELL_INTERRUPT = "SPELL_INTERRUPT"
COMBAT_LOG_EVENT_UNFILTERED = "COMBAT_LOG_EVENT_UNFILTERED"
UNIT_DIED = "UNIT_DIED"
PLAYER_ENTERING_WORLD = "PLAYER_ENTERING_WORLD"
DURATION_DYNAMIC = "dynamic"
PRIEST = "PRIEST"
spellData = {
}
UNIT_TARGET = "UNIT_TARGET"
SPELLCATEGORY = {
}
cooldownResets = {
}
LOSS_OF_CONTROL_ADDED = "LOSS_OF_CONTROL_ADDED"
SPELL_CAST_SUCCESS = "SPELL_CAST_SUCCESS"
NAME_PLATE_UNIT_ADDED = "NAME_PLATE_UNIT_ADDED"
UNIT_PET = "UNIT_PET"
}
(*temporary) = nil
(*temporary) = "SweepyBoop"
(*temporary) = "Title"
(*temporary) = "attempt to call global 'GetAddOnMetadata' (a nil value)"