Hello, I have a Macbook pro and recently tried to reset it by erasing the disks and reinstalling Big Sur MacOS, this worked but the remote management from my past business was still on it. I then tried resetting it again by erasing the disks and installing macOS Sierra, as that was the option in recovery mode, I think i made a mistake erasing the disks as now startup now shows a folder and question mark, and then the problem in recovery mode is when installing MacOS sierra it seems fine but then the blue bar gets to the end like it is finished and it gives me an error saying An error occured while preparing the installion. Try running this installation again. Ive tried fixing it my changing the date and messing around with the disk utility but I think I have done something wrong. Any help would be great if you need more information please tell me Thankyou.