Fix #2175

src/Ombi.Api.Mattermost/Models/MattermostMessage.cs

@@ -33,7 +33,7 @@ namespace Ombi.Api.Mattermost.Models
         /// Bot/User Icon
         /// </summary>
         [JsonProperty(PropertyName = "icon_url")]
-        public Uri IconUrl { get; set; }
+        public string IconUrl { get; set; }
 
         /// <summary>
         /// Message body. Supports Markdown
@@ -142,7 +142,7 @@ namespace Ombi.Api.Mattermost.Models
         /// Large images are resized to a maximum width of 400px or a maximum height of 300px, while still maintaining the original aspect ratio.
         /// </summary>
         [JsonProperty(PropertyName = "image_url")]
-        public Uri ImageUrl { get; set; }
+        public string ImageUrl { get; set; }
 
         /// <summary>
         /// An optional URL to an image file(GIF, JPEG, PNG, or BMP) that is displayed as a 75x75 pixel thumbnail on the right side of an attachment.

src/Ombi.Notifications/Agents/MattermostNotification.cs

@@ -203,13 +203,13 @@ namespace Ombi.Notifications.Agents
                     Username = string.IsNullOrEmpty(settings.Username) ? "Ombi" : settings.Username,
                     Channel = settings.Channel,
                     Text = model.Message,
-                    IconUrl = new Uri(settings.IconUrl),
+                    IconUrl = settings.IconUrl,
                     Attachments = new List<MattermostAttachment>
                     {
                         new MattermostAttachment
                         {
                             Title = model.Other.ContainsKey("title") ? model.Other["title"] : string.Empty,
-                            ImageUrl = model.Other.ContainsKey("image") ? new Uri(model.Other["image"]) : null,
+                            ImageUrl = model.Other.ContainsKey("image") ? model.Other["image"] : string.Empty,
                         }
                     }
                 };