The type or namespace name 'Newtonsoft' could not be found, and more in 2022.2.2f1 update.

[Yann_de_Couessin]

@Yazan-3Lines

I had the same problem, the fix was to delete the all the files and regenerate them, just make sure to not delete these folders (Assets,Packages,ProjectSettings) and delete anything else

Same issue, same fix !

[AABID965]

It worked wow Thanks Man!!!

[strongBearCeo]

For me, the problem was that Meta XR v72.0.0 packages require Newtonsoft.Json v3.0.2, but Unity installs v3.2.1 by default, I needed to manually install the correct version and ensure Unity doesn’t override it.