Writing int values to the texts, but its not working on phone

I’m developing a game for android and I’m writing the level on the top . So in code when you pass a level it puts plus on level and writes it in there (actually this how supposed to be). It’s also working on Unity but when I take it’s apk and try it on my phone it doesn’t work.

You have to convert int to string and then write the text in that way u can see it on the screen