Describe the bug

Getting the following error when loading into WoW:

Message: Interface/AddOns/BagAppraiser/const.lua:12: attempt to call local 'GetAddOnMetadata' (a nil value)
Time: Sun Aug 18 16:26:20 2024
Count: 1
Stack: Interface/AddOns/BagAppraiser/const.lua:12: attempt to call local 'GetAddOnMetadata' (a nil value)
[string "@Interface/AddOns/BagAppraiser/const.lua"]:12: in main chunk

Locals: Addon =

{
modules = {
}
defaultModuleLibraries = {
}
name = "BagAppraiser"
orderedModules = {
}
enabledState = true
CONST = {
}
defaultModuleState = true
}
ADDON_NAME = "BagAppraiser"
L = {
price_source_desc = "Predefined price sources for item value calculation."
disabled = "disabled"
item_added_blocklist = "Added %s to the blocklist."
quality_filter_toggled = "Quality filter %s"
open_options = "Left-Click to open the options window"
rare = "Rare"
tooltip_money_format_desc = "Controls the precision of the amounts shown in the tooltip."
region_historical_price = "Region Historical Price"
price_source_changed = "Price source changed to: "
recent = "3-Day Price"
item_on_allowlist = "%s is already on the allowlist."
enable_guild_bank = "Enable guild bank"
enabled = "enabled"
ahdb = "Auction House Database"
common = "Common"
min_buyout = "Minimum Buyout"
region_price = "Region Price"
feedback = "Feedback"
combinedtotal = "Combined Total"
quality_filter_desc = "Items below the selected quality will not factor into calculations"
stddev = "14-Day Std Dev"
epic = "Epic"
atr = "Auctionator"
feature_allowlist = "NEW -- BagAppraiser now supports allowlists! Check the config window for more details."
based_on = "Based on"
market = "14-Day Price"
about = "About"
bags = "Bags"
region_market_value_avg = "Region Market Value Avg"
item_on_blocklist = "%s is already on the blocklist."
text_display = "Text Display"
item_allowlist_nothing_detected = "No item detected, so nothing added to the allowlist."
quality_filter_changed = "Quality Filter set to: %s and above"
poor = "Poor"
guild_bank_last_updated = "Guild bank last updated"
author = "Written by clocklear (github.com/clocklear)"
tsm = "TradeSkillMaster"
bank_last_updated = "Bank last updated"
total = "Total"
item_allowlist_desc = "If enabled, only items added to the allowlist will be counted. Mutually exclusive with blocklist."
disabled_instructions = "BagAppraiser is running in disabled mode because a suitable pricing source cannot be found. You can fix this by installing one of the following addons:"
bank = "Bank"
ldb_money_format = "LDB Money Format"
bag = "Bag"
item_blocklist_toggled = "Item blocklist %s"
feature_pricing_sources = "NEW -- In addition to TSM, BagAppraiser now supports Auction House DataBase, Auctionator, and Oribos Exchange as alternative price sources."
price_source = "Price Source"
historical_price = "Historical Price"
item_allowlist_toggled = "Item allowlist %s"
auction_value = "Auction Value"
issue_tracker = "Issue Tracker:"
show_minimap_icon = "Show minimap icon"
recent_value = "Recent Market Value"
globalMean = "Regional Mean"
blocklist_removed_item = "Removed %s from blocklist."
market_value = "Market Value"
need_help = "Need help? Have a feature request? Open an issue on the code repository for BagAppraiser or send me a PM on Reddit."
show_top_contributors = "Show top contributors"
enable_guild_bank_desc = "Summarize the contents of the guild bank. This settings has no effect if you aren't in a guild."
realm_price = "Realm Price"
enable_quality_filter = "Enable quality filter"
credits = "Credits"
vendorsell = "VendorSell"
item_blocklist_nothing_detected = "No item detected, so nothing added to the blocklist."
woweconomy_thanks = "Thanks to /r/woweconomy for the support and the great feature ideas."
ldb_label_source_desc = "Controls what is displayed for the addon within LDB host frames."
price_source_poor = "Poor quality items are always valued with the VendorSell source."
item_blocklist_desc = "If enabled,