change model to .tflite file

[Semy-sudo]

I tried to convert the model I made into tflite and execute it.
I don't know what the problem is, but if i press the detection button, the app is shut down.
The model I made is sort of cat type, and I think there was a problem in the process of modifying the model to tflite.
Is there a way to find out if the model is .tflite file?