Can't Submit Apps to Appstore: Error Itms-90534: "Invalid Toolchain

ERROR-ITMS 90534 Invalid Toolchain

You are getting this error since you are using beta version of XCode, to avoid this error, use public version of XCode & this error will be resolved.

App archived with Xcode 11.2 (11B52) rejected: ITMS-90534: Invalid Toolchain

Xcode was updated to 11.2.1 version. Builds made in Xcode ver 11.2 are not valid anymore. If you do not see the update in the Mac App Store then go to your developer account and download new Xcode manually.

Uploading failed in Xcode 11.2 (11B52) rejected: ITMS-90534: Invalid Toolchain in MacOS Catalina 10.15

The only solution is to update xcode 11.2 to xcode 11.2.1
If you do not see update in appstore you can download xcode 11.2.1 from here Download
Xcode 11.2 is deprecated by Apple on November 5, 2019

All iOS apps submitted to the App Store must be built with the iOS 15 SDK or later, but our iOS SDK is already of version 15.2

I found that it was an embarrassing reason which caused the problem I raised above. I think I am responsible for showing what was going on to all who have read this post, and especially to those who had paused to think about this issue.

In short, Xcode 13.2.1 does build the app using iOS 15.2 SDK. enter image description here

I was able to successfully archive, verify in Xcode, and uploaded the binary to app store connect. However, I was not familiar with the app store connect and did not aware that there was another binary built with iOS 14.4 SDK which was left by my predecessor. enter image description here

Though I tried several times rebuild and re-upload, I kept falsely submitting the old binary to Apple's reviewer. enter image description here

That's it, and no bug or secret about Xcode using older version of iOS SDK to build apps, it is just not true. Xcode does build using its latest SDK. Again my apologies to those who also worried about this issue.

After updating to Xcode 10.2: Invalid Toolchain error when trying to submit app to App Store

Seems like Apple has fixed it!

Pushed “Submit for review” again, without any changes, with the same binary.

And the build stays in Waiting for Review status for a few hours already.