There is a lot of misinformation in the answers here, so I wanted to provide an authoritative response.
The issue here is that the new version of CoreSimulator.framework with Xcode 11 beta does validation on CFBundleVersion that previous versions did not do. These checks are valid, and it does represent an issue in your application, but there’s also a bug in how the checks were performed in Xcode 11 Beta 1 which compounds the issue.
First, fix the CFBundleVersion in your Info.plist. It should consist of only numbers and up to two periods (ie ##.[.##[.##]], eg: 12.4.2).
Second, after fixing CFBundleVersion, you need to killall -9 CoreSimulatorBridge because the old value is unfortunately cached in CoreSimulatorBridge, preventing it from recognizing the new value. This part was a bug, and it was addressed in Xcode 11 Beta 2.