Update to version 2020 most of my sprites are pink

Hey All,

After updating to version 2020 from 2017 most of my sprites have either disappeared or turned pink. These are controlled by an animation controller. I think this has something to do with the project conversion during the update. Does anyone know a fix for this? Thanks in advance!

Yes you have to update all your materials. There are videos on doing this. For the future you should never update a unity project unless there is something new that you have to have for your game. Otherwise you can keep with unity 5 even.