5.2.1 AngularFireAuthGuard causes TypeError: source.lift is not a function · Issue #2099 · angular/angularfire · GitHub
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Uncaught TypeError: isObject is not a function (with useBuiltIns: usage) · Issue #743 · zloirock/core-js · GitHub
5.2.1 AngularFireAuthGuard causes TypeError: source.lift is not a function · Issue #2099 · angular/angularfire · GitHub
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Getting an error Source.lift is not a function · Issue #601 · redux-observable/redux-observable · GitHub
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