I clicked claim certificate, but I didn’t receive it and basically all I can do is click show certificate but I am redirected to the main freecodecamp page and a notification shows -"******** has chosen to make their certifications private. They will need to make their certifications public in order for others to be able to view them." I have covered my username. However I set my profile to public and yet I can’t view it.
Here I kept some of the settings to public to claim the certificates and you can see that freecodecamp mentioned Your certifications will be disabled if set to private
HOPE THIS HELPS 
thank you, it worked, although it is showing my username instead of my name, thank you very much anyway
That happens if your name is set to private