Warning: Version control operation failed: Cmd('git') failed due to: exit code(128)

Warning: Version control operation failed: Cmd(‘git’) failed due to: exit code(128)
cmdline: git tag 102 HEAD
stderr: ‘fatal: tag ‘102’ already exists’

This is a non-fatal error. There is an automatic version number that gets incremented every time you save an MFiX project. This message means that somehow the version system is trying to tag this as version 102, but version 102 already exists. I’m not sure how this happened, but you can ignore this message, if you are not making active use of the Git version control features.