Game built but cannot run on simulator. Please help me with this log!

Hi guys,

I was be able to build and run my game on ios simulator before but after I add and remove some source file the game cannot run on the simulator. I pasted the log below.
I check the files under Compile Sources in the Build phase and there were no duplicated or missing file there.

 /Users/Andy/Library/Developer/CoreSimulator/Devices/B0617477-C888-4348-9E45-079E433AF0FC/data/Containers/Bundle/Application/BD0AFE31-2D5A-4E42-A930-873C70E7E560/FlappyBird-mobile.app/FlappyBird-mobile: missing input files
usage: /Users/Andy/Library/Developer/CoreSimulator/Devices/B0617477-C888-4348-9E45-079E433AF0FC/data/Containers/Bundle/Application/BD0AFE31-2D5A-4E42-A930-873C70E7E560/FlappyBird-mobile.app/FlappyBird-mobile [OPTION]... FILE... [-- FILE...]
  -b             Generate wire format binaries for any data definitions.
  -t             Generate text output for any data definitions.
  -c             Generate C++ headers for tables/structs.
  -g             Generate Go files for tables/structs.
  -j             Generate Java classes for tables/structs.
  -n             Generate C# classes for tables/structs.
  -o PATH         Prefix PATH to all generated files.
  -I PATH         Search for includes in the specified path.
  --strict-json   Strict JSON: add quotes to field names.
  --no-prefix     Don't prefix enum values with the enum type in C++.
  --gen-includes  Generate include statements for included schemas the
                  generated file depends on (C++).
  --proto         Input is a .proto, translate to .fbs.
FILEs may depend on declarations in earlier files.
FILEs after the -- must be binary flatbuffer format files.
Output files are named using the base file name of the input,and written to the current directory or the path given by -o.
example: /Users/Andy/Library/Developer/CoreSimulator/Devices/B0617477-C888-4348-9E45-079E433AF0FC/data/Containers/Bundle/Application/BD0AFE31-2D5A-4E42-A930-873C70E7E560/FlappyBird-mobile.app/FlappyBird-mobile -c -b schema1.fbs schema2.fbs data.json

I think that say it, but from what you posted, we can’t help.