Unity gives me a bunch of package errors after i change Editor version

Unity Engine
,
1

Since i moved my project to a different computer & then upgraded the editor version to 6000.0, Every time I open my Unity project, it gives me this message,
9816267--1410552--upload_2024-5-5_19-6-6.png
“An error occurred while resolving packages:
One or more packages could not be added to the local file system:
X Converting circular structure to JSON
→ starting at object with constructor ‘Error’
— property ‘error’ closes the circle”
For multiple packages,
Burst,
Cinemachine
Collections
InputSystem, etc

it also appears in the log as a single error I cannot clear

I tried to Re-import everything, restarted my computer, I updated my visual studio, I am not sure what to do.
Can anybody who has had this issue help me find out what’s causing it & what to do?

9816267--1410552--upload_2024-5-5_19-6-6.png

2

Try deleting the package cache folder with all editors closed. Then try again. This will redownload any packages in case they have become corrupt for some reason.

Make sure you have at least 20+ GB free disk space on OS and project drives.

If this doesn’t fix it try creating a new project to see if the issue occurs there as well.

3

9817707--1410909--upload_2024-5-6_8-29-30.png

It still seems to be happening, even when I creaed a new projct. I have my project & unity installed on a secondary Drive inside my computer with 128gb of space left. & I deleted the package cache

4

Did you try removing com.unity.ai.navigation and re-adding it in the package manager?

5

Hmmm “could not be added to the local file system” could also hint at a permission issue.

Note that free disk space should also be aplenty on the OS drive, since that’s where the package cache is located and also the TEMP folder and swap file.

6

No… It seems that Clearing up at least 25 GB of space, & reinstalling Unity to the main C: OS drive did not work either.

7

Okay, it has now been 3 Days since this has been happening & I still can’t get Unity to work.
I even switched back to an older Unity editor using the original project. & Now when I try to install a Package it tells me:

Manager Window] Error adding package: Converting circular structure to JSON → starting at object with constructor ‘Error’ — property ‘error’ closes the circle

8

Did you also delete the Library folder entirely? That often fixes issues.

9

Can you copy paste your Packages/manifest.json contents into this thread?

10

I did, & that didn’t seem quite to work either. It would just Recreate itself & the same problem would persist.

11

Sure thing!

{
“dependencies”: {
“com.unity.2d.sprite”: “1.0.0”,
“com.unity.cinemachine”: “2.10.0”,
“com.unity.collab-proxy”: “2.3.1”,
“com.unity.feature.development”: “1.0.1”,
“com.unity.ide.rider”: “3.0.28”,
“com.unity.ide.visualstudio”: “2.0.22”,
“com.unity.ide.vscode”: “1.2.5”,
“com.unity.inputsystem”: “1.7.0”,
“com.unity.jobs”: “0.70.0-preview.7”,
“com.unity.learn.iet-framework”: “3.1.3”,
“com.unity.probuilder”: “5.2.2”,
“com.unity.render-pipelines.universal”: “14.0.11”,
“com.unity.test-framework”: “1.1.33”,
“com.unity.textmeshpro”: “3.0.6”,
“com.unity.timeline”: “1.7.6”,
“com.unity.ugui”: “1.0.0”,
“com.unity.visualeffectgraph”: “14.0.11”,
“com.unity.visualscripting”: “1.9.4”,
“com.unity.modules.ai”: “1.0.0”,
“com.unity.modules.androidjni”: “1.0.0”,
“com.unity.modules.animation”: “1.0.0”,
“com.unity.modules.assetbundle”: “1.0.0”,
“com.unity.modules.audio”: “1.0.0”,
“com.unity.modules.cloth”: “1.0.0”,
“com.unity.modules.director”: “1.0.0”,
“com.unity.modules.imageconversion”: “1.0.0”,
“com.unity.modules.imgui”: “1.0.0”,
“com.unity.modules.jsonserialize”: “1.0.0”,
“com.unity.modules.particlesystem”: “1.0.0”,
“com.unity.modules.physics”: “1.0.0”,
“com.unity.modules.physics2d”: “1.0.0”,
“com.unity.modules.screencapture”: “1.0.0”,
“com.unity.modules.terrain”: “1.0.0”,
“com.unity.modules.terrainphysics”: “1.0.0”,
“com.unity.modules.tilemap”: “1.0.0”,
“com.unity.modules.ui”: “1.0.0”,
“com.unity.modules.uielements”: “1.0.0”,
“com.unity.modules.umbra”: “1.0.0”,
“com.unity.modules.unityanalytics”: “1.0.0”,
“com.unity.modules.unitywebrequest”: “1.0.0”,
“com.unity.modules.unitywebrequestassetbundle”: “1.0.0”,
“com.unity.modules.unitywebrequestaudio”: “1.0.0”,
“com.unity.modules.unitywebrequesttexture”: “1.0.0”,
“com.unity.modules.unitywebrequestwww”: “1.0.0”,
“com.unity.modules.vehicles”: “1.0.0”,
“com.unity.modules.video”: “1.0.0”,
“com.unity.modules.vr”: “1.0.0”,
“com.unity.modules.wind”: “1.0.0”,
“com.unity.modules.xr”: “1.0.0”
}
}
Although, some packages are missing.

12

Hey it looks like you are running into Unity Issue Tracker - Unable to add package due to "Converting circular structure to JSON" error, it should be fixed in Unity 6000.0.1f1. Can you try updating and seeing if that solves it?

1 Like
13

Hi!

I also want to say that when we fixed this issue, it was caused by an underlying misconfiguration in the environment which was an incorrect ComSpec environment variable (Windows-only), which is normally set to C:\Windows\System32\cmd.exe (if Windows is installed in C:\Windows) but it was set to an incorrect value, possibly by some other software installer changing that environment variable (there are many questions about wrong values in that environment variable on the Web).

If you need to use older Editor versions that are running into this issue, you might want to verify that the ComSpec environment variable is properly set in case that’s the root cause.

1 Like
14

Alright! the problem has been fixed. I deleted my library folder, & upgraded to a slightly newer release

15

Genius solved my “com.unity.burst: zlib: incorrect data check” error migrating up to 2022.3.33f1 from 2022.3.30f1 .

I just deleted
C:\Users\GameDevUser\AppData\Local\Unity\cache

and migrated again no problems.

1 Like