Xcode stuck in "Uploading package to the App Store" stage while uploading

I faced the same problem, and first what I tried was to check my traffic. So I found a process called java (ironic).

The process has since been renamed to com.apple.dt.Xcode.ITunesSoftwareService

If you will check info about this process there will be tab Open Files and Ports and there in the bottom of the log window, you will see %YourApp%.ipa. And in general if Sent Packets & Sent Bytes increasing that's mean uploading is not stuck it's just can be one of many issues such as:

• Bad connection
• Slow upload speed
• Accepting capacity of Apple servers
• Highload network
• etc.

To open Activity Monitor: Open Spotlight(cmd+space or ctrl+space) -> Type Activity Monitor -> open tab Network

Summary: Don't worry, and take your time :)

P.S. For increasing speed of upload you can not include bitcode.

P.S.S. Try also to use the Transporter app, sometimes it helps to speed up uploading. (https://apps.apple.com/in/app/transporter/id1450874784?mt=12)

I had this same problem. Trying to upload using Application Loader once you're on Xcode 11 doesn't work.

My solution was to use the new Transporter app.