DAYZ CORRUPT PLEASE HELP

[Boone]

I started up dayz and tried to join a server and a message came up on the loading screen saying my dayz was corrupt i re-installed dayz via steam but now when i try to join a server it cant authentacate also on dayz commander it comes up with a red triangle next to the mod that says

cnd.dayz.st resolved to 109.123.123.4
System.Net.WebException:The remote server returened an error:(404) Not Found.
At System.net.httpWtbRequest.GetResponse()
at Dotjosh.DayzCommander.App.Core.ModDownloader.DownloadAndExtract(Int64&totalDownloaded, Doubble totalSize)
At Dotjosh.DayzCommander.App.Core.ModVersionInstaller.InstallSynd(ModVersion new Version,ModVersionFile modVersionFile)

[𝓡𝓸𝓺𝓾𝓮]

try going to properties and disable steam cloud sync. It causes a lot of problems for certain games.