I got the same warning"command codesign failed with a nonzero exit code"
my project can not run on Simulator but totally ok on my real machine.
I tried " product -> Clean Build Folder". And it looks working for me.(OOPS, Just realized you said did it too and not working for you. rip.)
sen9527
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
From
夏洛特镇, PE, 加拿大