How to solve TortoiseGitPlink Fatal Error?

Question

I was using Git with beanstalk in windows 7. Now I got new system with Windows 8.1. Now I configured Git and Tortoisegit with new system.Its working fine in local commit but

Answer 1

Or run Putty authentication agent (Pageant.exe) from TortoiseGit folder (usually C:\Program Files\TortoiseGit\bin) and add PuttyKey manually to the app.