Application Loader: "Cannot proceed with delivery: an existing transporter instance is currently uploading this package"

I have been unable to overcome this error in Application Loader. I've quit, restarted, tried different computers - it's like the server is hung up on an op that I never initiated and it won't time out. Has anyone seen it before and beaten it?

Basically, you need to clear out the transport tokens. This can happen if you were to close out of Xcode while in the middle of submitting an app to iTunes Connect.

The token files now appear in the

Library/Caches/com.apple.amp.itmstransporter/UploadTokens/ subfolder of the given user's home directory. Which, honestly, is a better place for them anyway.

Delete any .token files in this directory.

-- If you are unable to find the .token files, this is because they are hidden in Finder. To hide/show hidden files in Finder, use the following Terminal command (TRUE = UNHIDE, FALSE = HIDE):

defaults write com.apple.finder AppleShowAllFiles TRUE;killall Finder

You need to clear out the transport tokens.

Open Terminal on your Mac, and paste:

rm /Users/<username>/Library/Caches/com.apple.amp.itmstransporter/UploadTokens/*.token

That should clear the stuck token. After this, try uploading the build again.

It might be because Xcode crashed as you were uploading your app. Either, all you need to do is delete the token files:

Open Terminal on your Mac, and paste:

rm ~/.itmstransporter/UploadTokens/*.token

That should clear it. If it still doesn't work (at this point you should try re-uploading your app), run that command on Terminal again, or manually go to...

/Users/<username>/.itmstransporter/UploadTokens/

...and delete all the .token files.

Hope that helps!

token was in here

/Users/(user_name)/Library/Caches/com.apple.amp.itmstransporter/UploadTokens/

Appreciated @WrightsCS 's answer It helps me to overcome Application Loader issue.

I would like to highlight one more thing here.

I proceed as per @WrightsCS answer and it resolved Application loader error:

Can not proceed with delivery: an existing transporter instance is currently uploading this package

But I found one more issue after removing all tokens from

/Users//.itmstransporter/UploadTokens/

I went to iTunesConnect and clicked on "My Apps", what I saw a message that "Can not connect... please contact Apple".

Here I don't know why it suddenly stops working!

I submitted the same build which was there on iTunesConnect for submission but it has shown as processing.

After submission of that build, iTunesConnect works fine! Also, I am able to see last uploaded build in a list for submission.