It didn't work for me, but uploading with 12.4 does at least.

I've submitted report PM – FB9090561 via Feedback Assistant

I'm getting the same issue during the process of either archiving a project to upload or attempting to upload to the App Store. The crash logs are automatically uploaded to Apple of course, but the report flags the current as the crash wherever it actually fails during the sequence. "Application Specific Information: ProductBuildVersion: 12E262 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-18168/DVTITunesSoftwareServiceFoundation/App Loader/Wrappers/DVTITunesConnectApplicationVersionDescription.m:70 Details:  (y) should not be nil. Object:   DVTITunesConnectApplicationVersionDescription: 0x132e56700 Method:   -initWithCoder: Thread:   NSThread: 0x132e1f5d0{number = 39, name = (null)} Open FDs: 52/9472"