MT5 Git Commit is greyed out

 

I have made changes to several MT5 *.mqh files, but on right-click, the Git Commit entry is greyed out.

How do I commit my changes?

 
Don Baechtel:
The first thing that comes to mind is: do you have your MQL5 account linked in MetaEditor? The button usually appears greyed out when no session is active.