getting an error while installing git-source-control

getting an error while installing  git-source-control

Log of error 
 

zpm "install git-source-control"

[TTN|git-source-control]    Reload START (/Users/irisusr/mgr/.modules/TTN/git-source-control/2.2.0/)
[TTN|git-source-control]    Reload SUCCESS
[git-source-control]    Module object refreshed.
[TTN|git-source-control]    Validate START
[TTN|git-source-control]    Validate SUCCESS
[TTN|git-source-control]    Compile START
[git-source-control]    Compile FAILURE
ERROR! Error registering reference '^Studio.SourceControl.ChangeI("$Change")' for use by 'SourceControl.Git.Change.cls': <PROTECT>IncompatibleUse+3^%ExtentMgr.GlobalRegistry.1
  > ERROR #5030: An error occurred while compiling class 'SourceControl.Git.Change'