git-svn doesn't work after updating SourceTree to 2.7.6

[X Zhang]

Dear all,

After updating SourceTree to 2.7.6, git-svn doesn't work. When I pull from or push to repository Subversion, it says:

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree svn rebase 

Can't locate Git/SVN.pm in @INC (you may need to install the Git::SVN module) (@INC contains: /usr/local/git/share/perl5 /Applications/Sourcetree.app/Contents/Resources/git_local/lib/perl5/site_perl /Library/Perl/5.18/darwin-thread-multi-2level /Library/Perl/5.18 /Network/Library/Perl/5.18/darwin-thread-multi-2level /Network/Library/Perl/5.18 /Library/Perl/Updates/5.18.2 /System/Library/Perl/5.18/darwin-thread-multi-2level /System/Library/Perl/5.18 /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level /System/Library/Perl/Extras/5.18 .) at /Applications/Sourcetree.app/Contents/Resources/git_local/libexec/git-core/git-svn line 21.

BEGIN failed--compilation aborted at /Applications/Sourcetree.app/Contents/Resources/git_local/libexec/git-core/git-svn line 21.

Completed with errors, see above

Is there any solution to this error ? 

[赵盛纬]

you can run cmd   "cpan Git::SVN"

this helped me to solve this problem

[Xiong Zhang]

Thank you for your help.
cpan installs perl 5.26, but my SourceTree looks for perl 5.18, so it does not solve my problem.