Installing Input Manager breaks LWPR/URP Namespaces - Unity 2019.4.16f1

Hi everyone,
This is what I am using
Unity: 2019.4.161f
URP: 7.5.3 (Upgraded from an earlier LWRP version)

Everything is running fine. Now, I install Input System 1.0.2. Once this update is complete I start getting errors.
I have files which I use for a cartoon outline effect in my game.
These files are now throwing errors because they cannot find the namespace Universal.

How can updating the Input Manager break these URP files? I can see the namespace at the top is still LWRP, so did that somehow get removed when updating the Input Manager?
Thanks in advance.


Well it’s fixed now, and I have no idea how.
All I done was expand the list of references in Visual Studio. Some of the had a yellow warning icon on the which went away a second after I looked at them. Then the errors went away. I don’t know what the files were.
If anyone else has this problem just try opening the references in the Solution Explorer and scrolling to the very bottom. Make sure no yellow warning symbols are there.
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