Hello,
This problem is exactly the same thing I am facing, would love a solution this issue. I have also ensured the four things that Dmitry has ensured for his project. No idea what could be going wrong.
Thank You
Matthew_Ager
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Good news, my manager solved this problem. For us we had to go to build settings for the main target and for the One Signal target and under "Code Signing Identity" we reset "Any iOS SDK" to its default value. This allowed our archive to get push notifications once again.