new installation, trying to push fails: cannot spawn, unable to fork, no such file or directory

[alcalaa]

git -c diff.mnemonicprefix=false -c core.quotepath=false --no-optional-locks push -v --tags origin master:master
Pushing to ssh://git@bitbucket.fpa.rbxd.ds/guard/scheduler.git
error: cannot spawn C:\Users\***\AppData\Local\SourceTree\app-3.2.6\tools\putty\plink.exe: No such file or directory
fatal: unable to fork

Completed with errors, see above.