Solving many bugs.

Kyoo/InternalAPI/LibraryManager/LibraryManager.cs

@@ -748,6 +748,9 @@ namespace Kyoo.InternalAPI
 
         public void RegisterShowPeople(long showID, List<People> people)
         {
+            if (people == null)
+                return;
+
             string linkQuery = "INSERT INTO peopleLinks (peopleID, showID, role, type) VALUES($peopleID, $showID, $role, $type);";
 
             for (int i = 0; i < people.Count; i++)

Kyoo/InternalAPI/MetadataProvider/Implementations/TheTvDB/HelperTvDB.cs

@@ -71,7 +71,7 @@ namespace Kyoo.InternalAPI.MetadataProvider.TheTvDB
 
         public long? GetYear(string firstAired)
         {
-            if (long.TryParse(firstAired?.Substring(0, 4), out long year))
+            if (firstAired?.Length >= 4 && long.TryParse(firstAired?.Substring(0, 4), out long year))
                 return year;
 
             return null;

Kyoo/InternalAPI/MetadataProvider/Implementations/TheTvDB/ProviderTheTvDB.cs

@@ -276,12 +276,12 @@ namespace Kyoo.InternalAPI.MetadataProvider
             string id = GetID(externalIDs);
 
             if (id == null)
-                return null;
+                return new Episode(seasonNumber, episodeNumber, null, null, null, -1, null, externalIDs);
 
             string token = await Authentificate();
 
             if (token == null)
-                return null;
+                return new Episode(seasonNumber, episodeNumber, null, null, null, -1, null, externalIDs);
 
             WebRequest request = WebRequest.Create("https://api.thetvdb.com/series/" + id + "/episodes/query?airedSeason=" + seasonNumber + "&airedEpisode=" + episodeNumber);
             request.Method = "GET";
@@ -313,13 +313,13 @@ namespace Kyoo.InternalAPI.MetadataProvider
                 {
                     Debug.WriteLine("&TheTvDB Provider couldn't work for the episode number: " + episodeNumber + ".\nError Code: " + response.StatusCode + " Message: " + response.StatusDescription);
                     response.Close();
-                    return null;
+                    return new Episode(seasonNumber, episodeNumber, null, null, null, -1, null, externalIDs);
                 }
             }
             catch (WebException ex)
             {
                 Debug.WriteLine("&TheTvDB Provider couldn't work for the episode number: " + episodeNumber + ".\nError Code: " + ex.Status);
-                return null;
+                return new Episode(seasonNumber, episodeNumber, null, null, null, -1, null, externalIDs);
             }
         }