Hi again, I'm facing a huge problem with Umbraco.Web.Scheduling.KeepAlive

 2019-03-02 09:52:41,462 [P34520/D2/T34] INFO  Umbraco.Core.PluginManager - Resolving umbraco.interfaces.IDiscoverable
 2019-03-02 09:52:41,509 [P34520/D2/T34] INFO  Umbraco.Core.PluginManager - Resolved umbraco.interfaces.IDiscoverable (took 49ms)
 2019-03-02 09:52:41,527 [P34520/D2/T34] INFO  Umbraco.Core.PluginManager - Resolving [Umbraco.Core.Persistence.Mappers.MapperForAttribute]Umbraco.Core.Persistence.Mappers.BaseMapper
 2019-03-02 09:52:41,527 [P34520/D2/T34] INFO  Umbraco.Core.PluginManager - Resolved [Umbraco.Core.Persistence.Mappers.MapperForAttribute]Umbraco.Core.Persistence.Mappers.BaseMapper (took 1ms)
 2019-03-02 09:52:41,650 [P34520/D2/T56] ERROR Umbraco.Web.Scheduling.KeepAlive - Failed (at "https://mydomain.com:443/umbraco").
    System.Threading.Tasks.TaskCanceledException: A task was canceled.
       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
       at Umbraco.Web.Scheduling.KeepAlive.<PerformRunAsync>d__4.MoveNext()
     2019-03-02 09:52:41,869 [P34520/D2/T34] ERROR Umbraco.Core.PluginManager - Error creating type Umbraco.Core.Persistence.Mappers.RelationTypeMapper
    The thread has been aborted, because the request has timed out.
    System.Threading.ThreadAbortException: Thread was being aborted.
       at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
       at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
       at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
       at System.Activator.CreateInstance(Type type, Boolean nonPublic)
       at System.Activator.CreateInstance(Type type)
       at Umbraco.Core.ActivatorServiceProvider.GetService(Type serviceType)
       at Umbraco.Core.ServiceProviderExtensions.CreateInstances[T](IServiceProvider serviceProvider, IEnumerable`1 types, ILogger logger, Boolean throwException)
     2019-03-02 09:52:44,682 [P34520/D2/T34] ERROR Umbraco.ModelsBuilder.Umbraco.PureLiveModelFactory - Failed to build models.
    The thread has been aborted, because the request has timed out.
    System.Threading.ThreadAbortException: Thread was being aborted.
       at Umbraco.Core.Cache.DictionaryCacheProviderBase.<>c__DisplayClass1.<GetSafeLazy>b__0()
       at System.Lazy`1.CreateValue()
       at System.Lazy`1.LazyInitValue()
       at System.Lazy`1.get_Value()
       at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItem(String cacheKey, Func`1 getCacheItem, Nullable`1 timeout, Boolean isSliding, CacheItemPriority priority, CacheItemRemovedCallback removedCallback, CacheDependency dependency)
       at Umbraco.Core.Cache.HttpRuntimeCacheProvider.GetCacheItem(String cacheKey, Func`1 getCacheItem)
       at Umbraco.Core.Cache.DeepCloneRuntimeCacheProvider.GetCacheItem(String cacheKey, Func`1 getCacheItem)
       at Archetype.Extensions.ArchetypeHelper.GetArchetypePreValueFromDataTypeId(Int32 dataTypeId)
       at Archetype.Extensions.ArchetypeHelper.IsPropertyValueConverterOverridden(Int32 dataTypeId)
       at Archetype.PropertyConverters.ArchetypeValueConverter.IsConverter(PublishedPropertyType propertyType)
       at Umbraco.Core.Models.PublishedContent.PublishedPropertyType.<InitializeConverters>b__0(IPropertyValueConverter x)
       at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()
       at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
       at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
       at Umbraco.Core.Models.PublishedContent.PublishedPropertyType.InitializeConverters()
       at Umbraco.Core.Models.PublishedContent.PublishedPropertyType..ctor(PublishedContentType contentType, PropertyType propertyType)
       at Umbraco.Core.Models.PublishedContent.PublishedContentType.<.ctor>b__0(PropertyType x)
       at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
       at System.Linq.Buffer`1..ctor(IEnumerable`1 source)
       at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
       at Umbraco.Core.Models.PublishedContent.PublishedContentType..ctor(IContentTypeComposition contentType)
       at Umbraco.Core.Models.PublishedContent.PublishedContentType.CreatePublishedContentType(PublishedItemType itemType, String alias)
       at Umbraco.Core.Models.PublishedContent.PublishedContentType.<>c__DisplayClass10.<Get>b__f()
       at Umbraco.Core.Cache.CacheProviderExtensions.<>c__DisplayClass9`1.<GetCacheItem>b__8()
       at Umbraco.Core.Cache.StaticCacheProvider.<>c__DisplayClass1a.<GetCacheItem>b__19(String key)
       at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
       at Umbraco.Core.Cache.StaticCacheProvider.GetCacheItem(String cacheKey, Func`1 getCacheItem)
       at Umbraco.Core.Cache.CacheProviderExtensions.GetCacheItem[T](ICacheProvider provider, String cacheKey, Func`1 getCacheItem)
       at Umbraco.Core.Models.PublishedContent.PublishedContentType.Get(PublishedItemType itemType, String alias)
       at Umbraco.ModelsBuilder.Umbraco.Application.GetTypes(PublishedItemType itemType, IContentTypeBase[] contentTypes) in X:\Projects\Umbraco\ModelsBuilder\Zbu.ModelsBuilder\Umbraco.ModelsBuilder\Umbraco\Application.cs:line 162
       at Umbraco.ModelsBuilder.Umbraco.Application.GetAllTypes() in X:\Projects\Umbraco\ModelsBuilder\Zbu.ModelsBuilder\Umbraco.ModelsBuilder\Umbraco\Application.cs:line 54
       at Umbraco.ModelsBuilder.Umbraco.PureLiveModelFactory.GetModelsAssembly(Boolean forceRebuild) in X:\Projects\Umbraco\ModelsBuilder\Zbu.ModelsBuilder\Umbraco.ModelsBuilder\Umbraco\PureLiveModelFactory.cs:line 288
       at Umbraco.ModelsBuilder.Umbraco.PureLiveModelFactory.EnsureModels() in X:\Projects\Umbraco\ModelsBuilder\Zbu.ModelsBuilder\Umbraco.ModelsBuilder\Umbraco\PureLiveModelFactory.cs:line 221
     2019-03-02 09:52:44,700 [P34520/D2/T34] WARN  Umbraco.ModelsBuilder.Umbraco.PureLiveModelFactory - Running without models.
     2019-03-02 09:52:44,729 [P34520/D2/T54] INFO  Umbraco.ModelsBuilder.Umbraco.PureLiveModelFactory - Detected files changes.

After this nasty error , it keeps appearing every 2 seconds and keeps my website down. When I restarted the website, all runs perfeclty, but if I dont restart it, website is down and error keeps appearing.

I really do'n have any clue how to fix it and it is appearing now frequently.

I'm currently use Umbaco 7.6.3 with Azure and load balancing. PS: Load balancing is configured using specifications from Umbraco Documentation.

Greetings.