Error occupying

Hi there yoga198,

Thanks for using Apple Support Communities. It looks like you are not able to install iOS 14.4. This article has some steps that should resolve your issue: If your iPhone, iPad or iPod touch won’t update.

We hope this helps!

I see that you don’t have a Wi-Fi connection, which is required when updating. Here is some troubleshooting information for other things to check→Updating iOS: common issues and solutions - Apple Community