The error message "status 7" means that you tried to Flash Incompatible firmware - So if you Flashed the Canadian CSC on the US Firmware it's always going to Fail to Flash! You need to be fully on the US Firmware - Without the Canadian CSC to Flash an update zip in Recovery. This probably is not the best place for people to be learning how to do this.... And I have a feeling that eventually Samsung Mods will be deleting all of it...
So Odin back to whatever US Firmware you need to be on - Boot - Then Reboot into Recovery & Flash the One UI beta zip update then - After you are on the One UI beta - Then you can Boot into Download Mode & Flash the Canadian CSC (if that's what you have been doing).
