2 files changed, 24 insertions, 5 deletions
diff --git a/Emby.Server.Implementations/Channels/ChannelManager.cs b/Emby.Server.Implementations/Channels/ChannelManager.cs
index 94ff7c342..0df916ded 100644
--- a/Emby.Server.Implementations/Channels/ChannelManager.cs
+++ b/Emby.Server.Implementations/Channels/ChannelManager.cs
@@ -1108,7 +1108,11 @@ namespace Emby.Server.Implementations.Channels
                 {
                     if (_fileSystem.GetLastWriteTimeUtc(cachePath).Add(cacheLength) > DateTime.UtcNow)
                     {
-                        return _jsonSerializer.DeserializeFromFile<ChannelItemResult>(cachePath);
+                        var cachedResult = _jsonSerializer.DeserializeFromFile<ChannelItemResult>(cachePath);
+                        if (cachedResult != null)
+                        {
+                            return cachedResult;
+                        }
                     }
                 }
             }
@@ -1131,7 +1135,11 @@ namespace Emby.Server.Implementations.Channels
                     {
                         if (_fileSystem.GetLastWriteTimeUtc(cachePath).Add(cacheLength) > DateTime.UtcNow)
                         {
-                            return _jsonSerializer.DeserializeFromFile<ChannelItemResult>(cachePath);
+                            var cachedResult = _jsonSerializer.DeserializeFromFile<ChannelItemResult>(cachePath);
+                            if (cachedResult != null)
+                            {
+                                return cachedResult;
+                            }
                         }
                     }
                 }
@@ -1162,6 +1170,11 @@ namespace Emby.Server.Implementations.Channels
 
                 var result = await channel.GetChannelItems(query, cancellationToken).ConfigureAwait(false);
 
+                if (result == null)
+                {
+                    throw new InvalidOperationException("Channel returned a null result from GetChannelItems");
+                }
+
                 if (!startIndex.HasValue && !limit.HasValue)
                 {
                     CacheResponse(result, cachePath);
diff --git a/Emby.Server.Implementations/Security/MBLicenseFile.cs b/Emby.Server.Implementations/Security/MBLicenseFile.cs
index 4b6a82b6c..76741bdf8 100644
--- a/Emby.Server.Implementations/Security/MBLicenseFile.cs
+++ b/Emby.Server.Implementations/Security/MBLicenseFile.cs
@@ -57,9 +57,14 @@ namespace Emby.Server.Implementations.Security
             _updateRecords.AddOrUpdate(key, value, (k, v) => value);
         }
 
+        private Guid GetKey(string featureId)
+        {
+            return new Guid(_cryptographyProvider.ComputeMD5(Encoding.Unicode.GetBytes(featureId)));
+        }
+
         public void AddRegCheck(string featureId)
         {
-            var key = new Guid(_cryptographyProvider.ComputeMD5(Encoding.Unicode.GetBytes(featureId)));
+            var key = GetKey(featureId);
             var value = DateTime.UtcNow;
 
             SetUpdateRecord(key, value);
@@ -68,7 +73,7 @@ namespace Emby.Server.Implementations.Security
 
         public void RemoveRegCheck(string featureId)
         {
-            var key = new Guid(_cryptographyProvider.ComputeMD5(Encoding.Unicode.GetBytes(featureId)));
+            var key = GetKey(featureId);
             DateTime val;
 
             _updateRecords.TryRemove(key, out val);
@@ -78,8 +83,9 @@ namespace Emby.Server.Implementations.Security
 
         public DateTime LastChecked(string featureId)
         {
+            var key = GetKey(featureId);
             DateTime last;
-            _updateRecords.TryGetValue(new Guid(_cryptographyProvider.ComputeMD5(Encoding.Unicode.GetBytes(featureId))), out last);
+            _updateRecords.TryGetValue(key, out last);
 
             // guard agains people just putting a large number in the file
             return last < DateTime.UtcNow ? last : DateTime.MinValue;