My iphone in recovery mode after installation update and wouldn't to exit

We have available update on my iphone IOS15, I download to my device and installed, after installed my iphone change to recovery mode, I was tray to connect to pc, through pc say you have an update to download, I downloaded to my pc then to my iphone device, in the middle of the progress line the download stop in verifying process and give an message can't update unknown error occurred 1102. When press OK its going out and the device stuck on the middle of the progresss of the update and can't update, I tray the same process and have the same message every time, any help to resolve this update issue, thank you