Platform (Browser -Chrome, Firefox etc / Mini client) :Mini Client
Server number :S16
Character name :Tag
UID (Facebook account - you can find your UID on the bottom of the Facebook page, Oasis account - go to your profile page and click on your avatar) : 200000084812904

Description of the problem you are experiencing :Every time i click to complete the mission i get an error
Operating system :windows 10 OS
Screen resolution : 720P
Your computer time zone and your country : Albania gmt +2
Are you using VPN ? : No

Screenshot of the error page :