In my case, the following solved the problem.
I paid attention again to the order of the Build Phase.
When I was checking the Build Phase, I found that the "Embed Foundation Extensions" (Widget Extension) related to WatchApp were last in the order. (RunScript was also executed in the middle).
I noticed this and solved the problem by rearranging the order of Embed Foundation Extensions to be right after Copy Bundle Resources.
Akira_Hayakawa_Atsurae
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