Invalid Signature error !

Question

I am trying to update my application , but after uploading the binary , Itunes connect sends me this email :

Dear Developer, Thank you for your recent

Answer 1

I got the same problem and spent many evenings solving it!

For my app the problem was a question mark in the executable name. In the apple developer docs is noted you can't use special character in executable name but not which ones are allowed. I changed the executable name in build settings and the upload works!