I am not able to backup to icloud even when connected to wi-fi network

Hello sibusisofromgermiston,
Thank you for using Apple Support Communities. It's my understanding you've been unable to back up with iCloud. Backups contain a lot of valuable content, so I definitely understand the importance of successfully creating one. I am happy to help.
There are a few causes and of iCloud backup issues. First, I recommend testing this issue on a different Wi-Fi network. If the issue persists, please use the link below to find your specific backup issue or error message.
If iCloud Backup couldn't be complete or you can't restore
Have an amazing day!

Got my phone replaced at the store and I'm trying to restore my backup now I get an error "cannot restore backup", used 3 different wifi and one of them was at the appstore the restore goes to about 99% or 1min left then it display the error below "HELP PLEASE" : (