What is selected shop is blocked from using this feature knight online?

As an AI language model, I don't have access to live server information for Knight Online, but generally, a selected shop in Knight Online may be blocked from using certain features due to violations of the game's terms of service (ToS) or user agreements. Common reasons for blocking shops include:

1. Selling virtual currencies or items for real money outside the game's official marketplace, which may create an unfair advantage for some players and affect the game's economy.

2. Using third-party software or hacks to obtain advantages in the game, such as auto-farming or speed hacks, which can also result in account suspensions or bans.

3. Harassing or scamming other players, such as by falsely advertising items or services in the shop, or using abusive language.

When a shop is blocked from using certain features in Knight Online, it may be temporary or permanent depending on the severity of the violation and the game's policies. Players are encouraged to report any suspicious activities or violations to the game's customer support team for investigation and action.