Apple Transporter failing to upload IPA with error: Failed to create .itmsp for 'appname' status code 401

Question

I am trying to upload an ipa to Transporter (to get new version on TestFlight) and have successfully done it in the past. However, today I tried to upload and it stopped with this error popup on the screen:

Failed to create the .itmsp for 'Appname'. The web service returned an unexpected status code (401 instead of 200)

screenshot: screenshot of error

Notes:

• tried multiple times today with same issue
• App is a Xamarin app thus can't upload the other way (Xcode > Archive)
• using Transporter app released by Apple

Fiske

Try waiting 24 hours? – Seaworthy

@Seaworthy just tried again (so 24 hours later) and no luck – Fiske

Answer 1

Try completely shutting down your device and then turning it back on and trying.

I had the same issue for most of yesterday and couldn't find a solution, and just now a reboot of my MacBook made it work instantly.

Interdict

Worked for me. It makes me sad that this is (sometimes) the solution. – Anaphora

Simply restarting Transporter was enough in my case – Aer

Answer 2

Just relaunch Transporter app, or quit and r-enter it again.

Bloodroot

Answer 3

I fixed my problem by matching the case of the SKU. com.company.appName wasn't accepted. I had to change it to com.Company.AppName on my info.plist.

Uncourtly

Answer 4

Some times it may due to memory issue. Check your memory. Free space up to minimum 2 GB for big project

Proparoxytone

Answer 5

Make sure to create an entry for your app in https://appstoreconnect.apple.com ?

Vivie

Answer 6

Just Shut Down Your Device And everything Ok

Prolix

Answer 7

I am getting that issue when I left build number empty. It seems like you could face the same sort of issues if you left Identity into under General tab.

Tarnopol

Answer 8

For me it was memory full issue. Freed up some space and the .ipa file was immediately accepted!

Octosyllable