Images.xcassets: error: Failed to find a suitable device for the type SimDeviceType

For me it did not help cleaning. I had to run sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService and then I was able to start the app via the Simulator

I had this error and solved it by just opening Simulator from the Xcode menu.

Xcode -> Open Developer Tool -> Simulator

Once the simulator was open and finished booting, I cleaned and rebuilt the project.