Failing to run app on IOS Mobile due to 'cloud_firestore' error

I am trying to run my app on my Iphone, however when I run the code it returns with:

"Could not run build/ios/iphoneos/Runner.app on 00008030-00124CA83C68202E. Try launching Xcode and selecting "Product > Run" to fix the problem: open iOS/Runner.xcworkspace"

When I open up my Xcode it shows this error:

I have no idea what I am doing wrong, since this I have run the app on my iPhone many times before. Any suggestions?

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