Hi
On older models of the iPad this like this can be a bit more common
There is a way around it though:-)
If you open iTunes/finder on a Mac and plug it in you can update it that way
If you are using a windows computer you just need to download iTunes and do the same thing
When you plug it in there will be a iPad icon near the top of the screen ,click on it and you will have a option to update it
Here’s a video If need a guide
[link|https://m.youtube.com/watch?v=UpAg4QknEGY|https://m.youtube.com/watch?v=UpAg4QknEGY|new_window=true]
Hopefully this helps
Any questions please ask
Thanks:-)