I think this is a temporary issue from iTunes connect if you wish to remove you currunt build from App Store that appear as a waiting for review follow the following steps.
with the new iTunes connect you if your app is waiting for Review state you can see this type of information in side your app Details.
When you click on remove this version from review.
UPDATE
When your app is rejected or you are trying to new app upload do following steps:
- First You have to upload a binary again from
Xcode or Application Loader. There is appear you last setup Build with Version number select it and upload again.
- Then, wait for some processing time and open your iTunes Connect account. You can check your uploaded build in Prerelease tab
- After processing finish In Build section Click on + button and select a correct binary that you have uploaded and save. Here is actual Guide.
- After that you may click on Submit for Review Button. And it may take some time for uploading on iTunes again
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