Had the same problem, but solved.
You can try to add arm64 to the Build Settings -> Architectures -> Excluded Architectures for Any iOS Simulator SDK. It helps many of devs, but for me it didn't work.
You can Clean Build Folder (⇧ + ⌘ + K), clean DerivedData directory, CocoaPods caches, and restart macOS, Xcode and Simulator. This solution works for me.
Topic:
Developer Tools & Services
SubTopic:
Xcode
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