The value of the property 'type' cannot be parsed. The error is: Could not load type 'Google.Api.Ads.Common.Lib.SoapListenerExtension'

I got this exception I tried in all ways but none of them worked. Please if any have any idea please let me know. I facing this issue since last week. I am using c# .net System.Configuration.ConfigurationErrorsException HResult=0x80131902 Message=The value of the property 'type' cannot be parsed. The error is: Could not load type 'Google.Api.Ads.Common.Lib.SoapListenerExtension' from assembly 'Google.Ads.Common'. Source= StackTrace: