For security reasons, there are restrictions on how NX Credit can be spent. Below you will find specific restrictions for Mabinogi. When completing a purchase from the Cash Shop, your character's total cumulative level is shown in parentheses.
Mabinogi
Update 2/13/20 - When NX Credit is purchased for the first time on an account and when certain other criteria are met, a 7-day restriction timer is started on the account. If an item is purchased in the Cash Shop during this timed 7-day period, the account will be restricted from certain trade-related actions in-game. Players will be notified in-game when attempting the restricted trade actions.
Please note that this will not affect any prepaid purchases.
The 50045:LevelRestriction error indicates that your character is not a high enough total cumulative level for the item you're trying to purchase. Some items have a NX Credit level restriction; the lowest level being level 30, and the highest being level 500. Using NX Prepaid does not have a level restriction.
Booster Packages, Enchant / Repair Protection Potions, select Homestead items, and Hairstyle Storage Coupons cannot be purchased with NX Credit until a character has reached level 30.
Dyes, select Potions, Extra Equipment Slot Coupons, and Dragon Summoning Scrolls cannot be purchased with NX Credit until a character has reached level 100.
Gachapon, Reforging Tools, and Inventory Expansion Coupons cannot be purchased with NX Credit until a character has reached level 500.
The Pet Adoption Medal cannot be purchased with NX Credit until a character has reached level 32,000.