(Conditional) This applies if you are using Designer 4.8.1 or later versions.
If you try to update Designer packages, then Designer displays the Can’t Connect to any repository error message in the following scenarios:
you have set basic authentication for package updates, and
you also try to perform any Git operations on existing repositories.
The issue is not observed when you perform Git operations on a new repository.
Workaround: Restart Designer after updating Designer packages.