I have this issue both in 18.10 and 19.04. Using arrows and space does not work, the only workaround I've found is "sudo software-properties-gtk". Would be happy to provide any details that could be useful.
I have this issue both in 18.10 and 19.04. Using arrows and space does not work, the only workaround I've found is "sudo software- properties- gtk". Would be happy to provide any details that could be useful.