If you are having issues with the Merge Request Review Overview section not loading please do the following:

In the Project General Setting go to the Merge Request section, expand. Make a change - any change - and save. Revert the change and save.

Tags give the ability to mark specific points in history as being important
Repository has no tags yet.
Use git tag command to add a new one:
git tag -a v1.4 -m 'version 1.4'