Question: While updating packages in XCode 13.3, I get SwiftPM.SPMRepositoryError error 3 and no further details. What is the meaning of this error? How to fix it?

I removed all packages and added them back one by one. But it doesn't seem to be triggered by any specific package. It seems to be triggered by any package.

Answer: 
Right click the "**Package Dependencies**" in the project navigator, then select "**Reset Package Caches**" will fix this.  

This problem happens because you probably cleaned some Xcode cache, and SPM caches got corrupted.
I had this problem and had to do a few things:

* Update some of the swift packages to later versions that support the new format of SPM package file that is used by Xcode 13.3 (\*)
* Quit Xcode
* rm -rf ~/Libray/Developer/Xcode/DerivedData
* rm -rf ~/Library/Caches/org.swift.swiftpm
* Start Xcode
* File->Packages->Reset Package Caches
* Build (could take a while depending on how many packages you have)

This fixed it for me

(\*) I had to update Auth0.swift to 2.0, AlamoFire to 5.5.0, and ZenDesk to 5.4.1