i got a error pls help

[Talon_AWD]

i got this error i do not understand cause it worked last time

System.DllNotFoundException: Unable to load DLL 'zlib32': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
at Sallos.Compressor32.uncompress(Byte[] dest, Int32& destLen, Byte[] source, Int32 sourceLen)
at Sallos.Compressor32.Decompress(Byte[] dest, Int32& destLength, Byte[] source, Int32 sourceLength)
at Sallos.ZLib.Unpack(Byte[] dest, Int32& destLength, Byte[] source, Int32 sourceLength)
at Sallos.ArchivedFile.Download(Stream output)
at Sallos.ArchivedFile.Download()
at Sallos.Archive.Load(Stream stream)
at Sallos.Archive..ctor(String title)
at Sallos.Archive.AquireArchive(String archiveName)
at Sallos.Core.Verify()
at Sallos.Core.Startup(String[] args)
at Sallos.Core.Main(String[] args)