Bugs after updating to 2019 from 2018 version

Hey guys,

I haven't been developing my game for a while. I figured i'll pick it back up again. I opened Unity and it told me there was a new update to the 2019 version (came from the latest 2018 version I believe). So i downloaded Unity hub, downloaded the 2019 version, reopend my game, and all of a sudden, I can't compile anymore because of this error (and some others).
Library\PackageCache\com.unity.2d.common@1.0.11-preview.1\Runtime\InternalBridge\InternalEngineBridge.cs(1,32): error CS0234: The type or namespace name 'UIElements' does not exist in the namespace 'UnityEngine.Experimental' (are you missing an assembly reference?)

It seems they changed some namespaces or whatever. Anyone know's what to do? I can't figure it out by myself. I really hope it can be fixed, it was a very big game already and i'm not feeling to start from scratch again

greets,

Oscar

 

I highly recommend avoiding 2019 atm, if you are at all serious about your work. its loaded with alot of issues that can break alot of things.

 

According to this,
https://blogs.unity3d.com/es/2018/0...g-the-tech-and-long-term-support-lts-streams/
If we want to develop a serious work, then I would recommend using 2018.4, it’s the latest Long Term Support stream, if there are some issues in 2018.4, Unity will continue to fix them until 2021. 2019.1 is the latest Tech stream, it will not be supported when 2019.2 comes out.

 

Ooh... that's to bad... I'm an embedded programmer and I only program games for fun in my spare time. In other words, I don't have a lot of experience with Unity. Can I still download 2018.4 and reverse it back to that build? Thanks for replying.

 

Open the package manager and update all out of date packages that your project uses, including preview packages as well.

 

Your issue is because UIElements is no longer an experimental feature. You'll need to change your code so it points to UIElements' new home, which obviously is not going to be in the UnityEngine.Experimental namespace.

https://unity3d.com/unity/whats-new/2019.1.0

Also, you shouldn't be just upgrading Unity versions without considering the costs. You should have a good reason for doing so, and seeing a popup about a new version isn't that.

Lastly, why are you concerned you'd need to start over from scratch? Are you not even backing up your own work? Worst case should be you just revert your most recent changes.

 

Just delete "Library". It worked for me.

 

I updated package manager's version in manifest.json and the error disappeared.
Before:
"com.unity.package-manager-ui": "2.0.8",
After:
"com.unity.package-manager-ui": "2.1.2",

 

Thanks! Worked for me!