Many thanks. Worked for me too!
I emptied all fields unter "Additional -> Test Information".
Morfing
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I'm using a run script (Target -> Build Phase -> Run script) which strips out all architectures that are not currently needed.
/bin/sh executing the script which executes lipo.
lipo tries to remove/create files which doesn't work due to missing permission.
Because of that Xcode 12.0.1 on Catalina 10.15.6 shows
"The file "name.app" couldn't be open-end because you don't have permissions to view it."
I can't change the permissions as the files/folders doesn't exist prior the compile.
Changing the permissions afterwards doesn't work because Xcode doesn't run the script again.
On "Clean build Folder" the files/folders are removed and so on.
How do I grant access for Xcode/sh/lipo on a folder which doesn't exist?