IOS 14.8 makes error, when trying update IPhone 6s

Hi there seppo53,

Thanks for joining us in Apple Support Communities! We understand you're having difficulty updating your iPhone to iOS 14.8 because an error alert appears. We're glad you're here, and we can provide some guidance.

Let's start by following the steps in the 'If you can’t reach the update server or can’t verify the update' section of this support article:

If your iPhone, iPad or iPod touch won’t update

Let us know how it goes.

Take care.