Unity Package Manager Error: An error occured while resolving packages

[assertor]

@MMccathron

I keep getting this error: An error occurred while resolving packages:
One or more packages could not be added to the local file system:
com.unity.settings-manager: EINVAL: invalid argument, futime
What could be causing this?

This problem also occurs when I use unity 6000.0.1f1 to install the cinemachine or spline package.

[Lorrieto]

@fahadasghar360_unity

To solve this problem go to Help>Reset Packages in Unity and problem will be solved.
If not then delete the <Project-Root>>Packages>manifest.json file. So, unity will auto generate the new file. These are the two best solutions for this

This helped, thanks

[assertor]

@Lorrieto

This helped, thanks

Sorry, after using these methods, the error did not disappear.

But I found a good solution:

1. Close the project (my project is on drive d)

2. Create a new project on the c drive

3. Use Package Manager to install the package I want to install (no error is reported here, it may be related to the drive disk where it is located)

4. In the “Library\Package Cache” folder of the new project, find and copy the package

5. Open the npm folder, such as: “D:\Users\UserName\AppData\Local\Unity\cache\upm\packages\packages.unity.com”

6. Paste package, and rename it, such as: “com.unity.settings-manager@2.0.1”

7. Delete other folders with the “.tmp” prefix in the npm folder.

8. Just reopen the project

[developerkraken1203]

can you please write a path to this file

[petercbritton]

I ran into the same problem when I was using an external drive. Shifting the project to an internal drive, resolved the issue.

[GauntletRunner2025]

It is still occuring, that projects cannot be created on non-C drives (in Windows at least)