Receiving this type of warning when application installed and showing nothing in application when it launched

[manuja96]

04-16 15:10:59.292 29757-29757/? W/System: ClassLoader referenced unknown path: /data/app/com.chatting.gourav.manujapp-1/lib/arm64

04-16 15:10:59.612 29757-29757/? W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
04-16 15:11:00.796 29757-29863/com.chatting.gourav.manujapp W/art: Long monitor contention with owner pool-1-thread-1 (29852) at long

com.android.org.conscrypt.NativeCrypto.RSA_generate_key_ex(int, byte[])(NativeCrypto.java:-2) waiters=0 in com.google.firebase.iid.zzab com.google.firebase.iid.zzaa.zzq(java.lang.String, java.lang.String, java.lang.String) for 1.192s