I\'ve been reading all the issues about the error:
dyld: Library not loaded: @rpath/Bolts.framework/Bolts Referenced from: /private/var/mobile/Containers/Bun
The easiest thing to do would be to ensure that your Protobuf.framework is a dependency in your target's scheme inside the Build step.
This tells Xcode to compile the Protobuf.framework created by your pod install/update whenever it builds your target.