I have solved it. It was a naming conflict of defined macros.

Have you resolved this issue? I'm also encountering this problem now and don't know how to solve it.

My app update was also rejected because of this.

i have same issue

We had the same problem, we couldn't download DSYM files in the background of App Store Connect.

After I updated another version a few days ago, the number of crashes in the App Store Connect background dropped a lot, and Xcode-Window-Organizer-Crashes did not show this crash.