BuildMethodException 283 errors

I am a noob at unity, I made a 2D game which needed players to stack pancakes. I have added Ads inside it, everything works fine until I tried to build the android file. When it is building the gradle project, it shows :

UnityEditor BuildPlayerWindow+BuildException: 283 errors

I am using 2019.4.12f1 and already downloaded sdk and jdk; I have unity ads and also IAP in my project. Hope this information helps : )

fixed! All I need to do is delete the space in the name