Can't find vuforia..

I uploaded unity from 2019.4.6f1 to 2020.1.3f1, opened a project, but can't find and load Vuforia...i can't uninstall, i can't reinstall...i can't do anything....any idea??? later i opened the same project in version 2019.4.6f1, and the same problem..

 

I had the same problem with 2020.1.6f1 and Vuforia 9.4.6

Just ensure that the manifest.json includes:

"scopedRegistries": [
{
"name": "Vuforia",
"url": "https://registry.packages.developer.vuforia.com/",
"scopes": [
"com.ptc.vuforia"
]
}
],
"dependencies": {
"com.ptc.vuforia.engine": "9.4.6",
...

To get your manifest.json, right click on the folder Packages of your Project window and select Show in Explorer.

Make the chages of your manifest with your project closed. Then open it.

 

so i have to manually add vuforia to every new project i make?