Sure, here is the full log:
05-15 15:01:25.943: E/Unity(20241): {
05-15 15:01:25.943: E/Unity(20241): "Code": 3,
05-15 15:01:25.943: E/Unity(20241): "Message": "Unable to instantiate mediation adapter class.",
05-15 15:01:25.943: E/Unity(20241): "Domain": "com.google.android.gms.ads",
05-15 15:01:25.943: E/Unity(20241): "Cause": "null",
05-15 15:01:25.943: E/Unity(20241): "Response Info": {
05-15 15:01:25.943: E/Unity(20241): "Response ID": "",
05-15 15:01:25.943: E/Unity(20241): "Mediation Adapter Class Name": "",
05-15 15:01:25.943: E/Unity(20241): "Adapter Responses": [
05-15 15:01:25.943: E/Unity(20241): {
05-15 15:01:25.943: E/Unity(20241): "Adapter": "MetaAudienceNetwork",
05-15 15:01:25.943: E/Unity(20241): "Latency": 0,
05-15 15:01:25.943: E/Unity(20241): "Ad Source Name": "",
05-15 15:01:25.943: E/Unity(20241): "Ad Source ID": "",
05-15 15:01:25.943: E/Unity(20241): "Ad Source Instance Name": "",
05-15 15:01:25.943: E/Unity(20241): "Ad Source Instance ID": "",
05-15 15:01:25.943: E/Unity(20241): "Credentials": {},
05-15 15:01:25.943: E/Unity(20241): "Ad Error": {
05-15 15:01:25.943: E/Unity(20241): "Code": 3,
05-15 15:01:25.943: E/Unity(20241): "Message": "Unable to instantiate mediation adapter class.",
05-15 15:01:25.943: E/Unity(20241): "Domain": "com.google.android.gms.ads",
05-15 15:01:25.943: E/Unity(20241): "Cause": "null"
05-15 15:01:25.943: E/Unity(20241): }
05-15 15:01:25.943: E/Unity(20241): }
05-15 15:01:25.943: E/Unity(20241): ],
05-15 15:01:25.943: E/Unity(20241): "Response Extras": {}
05-15 15:01:25.943: E/Unity(20241): }
05-15 15:01:25.943: E/Unity(20241): }
05-15 15:01:25.943: E/Unity(20241): System.Reflection.RuntimeMethodInfo:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
05-15 15:01:25.943: E/Unity(20241): UnityEngine.AndroidJavaProxy:Invoke(String, Object[])
05-15 15:01:25.943: E/Unity(20241): UnityEngine._AndroidJNIHelper:InvokeJavaProxyMethod(AndroidJavaProxy, IntPtr, IntPtr)
05-15 15:01:25.945: E/Unity(20241): {
05-15 15:01:25.945: E/Unity(20241): "Code": 3,
05-15 15:01:25.945: E/Unity(20241): "Message": "Unable to instantiate mediation adapter class.",
05-15 15:01:25.945: E/Unity(20241): "Domain": "com.google.android.gms.ads",
05-15 15:01:25.945: E/Unity(20241): "Cause": "null",
05-15 15:01:25.945: E/Unity(20241): "Response Info": {
05-15 15:01:25.945: E/Unity(20241): "Response ID": "",
05-15 15:01:25.945: E/Unity(20241): "Mediation Adapter Class Name": "",
05-15 15:01:25.945: E/Unity(20241): "Adapter Responses": [
05-15 15:01:25.945: E/Unity(20241): {
05-15 15:01:25.945: E/Unity(20241): "Adapter": "MetaAudienceNetwork",
05-15 15:01:25.945: E/Unity(20241): "Latency": 0,
05-15 15:01:25.945: E/Unity(20241): "Ad Source Name": "",
05-15 15:01:25.945: E/Unity(20241): "Ad Source ID": "",
05-15 15:01:25.945: E/Unity(20241): "Ad Source Instance Name": "",
05-15 15:01:25.945: E/Unity(20241): "Ad Source Instance ID": "",
05-15 15:01:25.945: E/Unity(20241): "Credentials": {},
05-15 15:01:25.945: E/Unity(20241): "Ad Error": {
05-15 15:01:25.945: E/Unity(20241): "Code": 3,
05-15 15:01:25.945: E/Unity(20241): "Message": "Unable to instantiate mediation adapter class.",
05-15 15:01:25.945: E/Unity(20241): "Domain": "com.google.android.gms.ads",
05-15 15:01:25.945: E/Unity(20241): "Cause": "null"
05-15 15:01:25.945: E/Unity(20241): }
05-15 15:01:25.945: E/Unity(20241): }
05-15 15:01:25.945: E/Unity(20241): ],
05-15 15:01:25.945: E/Unity(20241): "Response Extras": {}
05-15 15:01:25.945: E/Unity(20241): }
05-15 15:01:25.945: E/Unity(20241): }
05-15 15:01:25.945: E/Unity(20241): System.Reflection.RuntimeMethodInfo:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
05-15 15:01:25.945: E/Unity(20241): UnityEngine.AndroidJavaProxy:Invoke(String, Object[])
05-15 15:01:25.945: E/Unity(20241): UnityEngine._AndroidJNIHelper:InvokeJavaProxyMethod(AndroidJavaProxy, IntPtr, IntPtr)
Now it throws a different error, Ad inspector says that the Meta Audience Network is initialized