Why does dropdown crash on my phone?

Question

Android

Hello. I tested the application in Unity, everything worked. I went into the application on the phone and it crashed when the dropdown was opened normally.
With dropdown, the manipulations are only hiding the slider, replacing the sprite and assigning a value in the script at the start.

void Start(){timeCur = Int32.Parse(DateTime.Now.ToString("MM"))-1;mSelector.value = timeCur;}

If it does not crash, then it takes a long time to load.