Postman won't start after last update

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1

I’ve used Postman this morning, then closed it.

I think it auto-updated on close, but something must have failed because now it won’t start anymore.

I’ve checked in the task manager that it’s not running.

I’ve looked for logs, and found this:
”Squirrel-CheckForUpdate.log”

[25. 08. 25 09:46:58] info: Program: Starting Squirrel Updater: --checkForUpdate https://dl.pstmn.io/update/WIN64/11.58.2/stable?installationId=8d801507-e286-4a94-8f99-73d8e1d149c1&userId=10964626&syncEnabled=true&teamPlan=&teamId=0
[25. 08. 25 09:46:58] info: Program: Fetching update information, downloading from https://dl.pstmn.io/update/WIN64/11.58.2/stable?installationId=8d801507-e286-4a94-8f99-73d8e1d149c1&userId=10964626&syncEnabled=true&teamPlan=&teamId=0
[25. 08. 25 09:46:58] info: CheckForUpdateImpl: Using existing staging user ID: ef4d6153-9ef1-57c3-ad80-8f6750754531
[25. 08. 25 09:46:58] info: CheckForUpdateImpl: Downloading RELEASES file from https://dl.pstmn.io/update/WIN64/11.58.2/stable?installationId=8d801507-e286-4a94-8f99-73d8e1d149c1&userId=10964626&syncEnabled=true&teamPlan=&teamId=0
[25. 08. 25 09:46:59] info: FileDownloader: Downloading url: https://dl.pstmn.io/update/WIN64/11.58.2/stable/RELEASES?installationId=8d801507-e286-4a94-8f99-73d8e1d149c1&userId=10964626&syncEnabled=true&teamPlan=&teamId=0&id=Postman-win64&localVersion=11.58.2&arch=amd64
[25. 08. 25 09:46:59] warn: UpdateInfo: Couldn't get release notes for:Postman-win64-11.59.5-full.nupkg: System.IO.FileNotFoundException: Could not find file 'C:\Users\juraj\AppData\Local\Postman\packages\Postman-win64-11.59.5-full.nupkg'.
File name: 'C:\Users\juraj\AppData\Local\Postman\packages\Postman-win64-11.59.5-full.nupkg'
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
   at NuGet.ZipPackage.<>c__DisplayClass9_0.<.ctor>b__0()
   at NuGet.ZipPackage.EnsureManifest()
   at Squirrel.ReleaseEntry.GetReleaseNotes(String packageDirectory)
   at Squirrel.UpdateInfo.<FetchReleaseNotes>b__19_0(ReleaseEntry x)
[25. 08. 25 09:46:59] info: Program: Finished Squirrel Updater

UPDATE:
Reinstalling Postman fixed the issue…

1 Like
2

This happens when Postman’s auto-updater (Squirrel) fails while downloading or extracting the new .nupkg package.
The missing Postman-win64-11.59.5-full.nupkg file in your log shows that the update process was interrupted, leaving the installation in a broken state — which is why Postman won’t launch.

Reinstalling works because it restores all required packages and resets the updater state.
If anyone else faces this, a clean reinstall (and optionally clearing C:\Users\<user>\AppData\Local\Postman) is the quickest fix.

3

Hi,

I faced the same issue when Postman’s auto-updater failed. The log usually shows a missing .nupkg file like in your case. This happens when the update download or extraction gets interrupted.

The simplest fix is to reinstall Postman completely. Optionally, clear the folder C:\Users\<your-user>\AppData\Local\Postman before reinstalling to reset the updater state. After that, Postman should launch without issues.