Cinemachine not tracking in 2D

Hi all,
I am following the tutorial on Udemy to make a Stardew Valley style game. It was going fine, but yesterday I updated to the latest version of unity. Now, when I run the game, the cinemachine camera TRIES to follow the player but instantly snaps back to the original camera view. I have tried removing the camera, downloading the latest cinemachine in package manager and redoing it, but got the same results. I am not a unity pro, and am at a loss to how to fix this. Just fyi, the problem didn't start immediately after upgrading, the game ran once or twice without issues.

I have attatched my camera and cinemachine camera settings.

Can anybody help?

 

Hi! I tried downgrading to an older version, but the project would only load in safemode, and the scripts were a sea of errors. I put it back to the new version, and it works, but the problem with the camera is still there, of course!

 

Thank you Gregoryl. I learned a lesson about backing up today!

My Unity editor version is 2021.2.4f1 now, and had been using 2021.1.3f1

for Cinemachine I am using 2.8.3 and had been using 2.8.0 (but the problem was there before I upgraded)

thank you

 

So, this is embarassing! It was neither the editor version, or the cinemachine. SOMEHOW I had managed to create a copy of the cinemachine camera (which lives in the persistant scene with the player and game managers) and copy it to Scene1 where the scenery tiles and game items are. Embarassing!