Hashtopus illegal character error

C:\Users\xx\Desktop\Hashtopus>hashtopus.exe
Hashtopus 0.8.8a
Logging in to server...OK.
Loading task...assigned to 3, hashlist 1 (continue)

Unhandled Exception: System.ArgumentException: Illegal characters in path.
at System.IO.Path.CheckInvalidPathChars(String path)
at System.IO.Path.Combine(String path1, String path2)
at hashtopus.hashtopus.loadTask()
at hashtopus.hashtopus.Main(String[] args)

C:\Users\xx\Desktop\Hashtopus>


Anyone know what's wrong?