Log invalid config file exceptions

(cherry picked from commit e1d0e2c79975a10c12fc8551f5dcd4a79f1c94e7)

src/NzbDrone.Host/Bootstrap.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.IO;
 using System.Reflection;
 using System.Security.Cryptography;
@@ -8,15 +7,12 @@ using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using DryIoc;
 using DryIoc.Microsoft.DependencyInjection;
-using Microsoft.AspNetCore.DataProtection;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Hosting.WindowsServices;
 using NLog;
 using NzbDrone.Common.Composition.Extensions;
-using NzbDrone.Common.Disk;
 using NzbDrone.Common.EnvironmentInfo;
 using NzbDrone.Common.Exceptions;
 using NzbDrone.Common.Extensions;
@@ -24,7 +20,6 @@ using NzbDrone.Common.Instrumentation;
 using NzbDrone.Common.Instrumentation.Extensions;
 using NzbDrone.Core.Configuration;
 using NzbDrone.Core.Datastore.Extensions;
-using NzbDrone.Host;
 
 namespace NzbDrone.Host
 {
@@ -209,6 +204,8 @@ namespace NzbDrone.Host
             }
             catch (InvalidDataException ex)
             {
+                Logger.Error(ex, ex.Message);
+
                 throw new InvalidConfigFileException($"{configPath} is corrupt or invalid. Please delete the config file and Sonarr will recreate it.", ex);
             }
         }