I just made a "normal" Nuget install on a new site that I'm developing. I removed the default language english and added Swedish instead. I dont know if it had something to do with that! I tried to add english back again but no difference. This is the full error:

UrlTracker.Core.Domain.Models.Domain..ctor(int id, Nullable<int> nodeId, string name, string languageIsoCode, Url url)
UrlTracker.Core.Domain.DomainProvider+<>c.<CreateCollection>b__5_1(<>f__AnonymousType1<IDomain, Url> <>h__TransparentIdentifier0)
System.Linq.Enumerable+WhereSelectArrayIterator<TSource, TResult>.ToList()
UrlTracker.Core.Models.UrlTrackerCollectionBase<TThis, TElement>.Create(IEnumerable<TElement> elements, Nullable<int> total)
UrlTracker.Core.Domain.DomainProvider.CreateCollection(IEnumerable<IDomain> domains)
UrlTracker.Core.Domain.DomainProvider.GetDomains()
UrlTracker.Core.Caching.Memory.Domain.DecoratorDomainProviderCaching.<GetDomains>b__3_0()
Umbraco.Extensions.AppCacheExtensions+<>c__DisplayClass5_0<T>.<GetCacheItem>b__0()
Umbraco.Cms.Core.Cache.SafeLazy+<>c__DisplayClass1_0.<GetSafeLazy>b__0()
Umbraco.Cms.Core.Cache.ObjectCacheAppCache.Get(string key, Func<object> factory, Nullable<TimeSpan> timeout, bool isSliding, string[] dependentFiles)
Umbraco.Cms.Core.Cache.ObjectCacheAppCache.Get(string key, Func<object> factory)
Umbraco.Cms.Core.Cache.DeepCloneAppCache.Get(string key, Func<object> factory)
Umbraco.Extensions.AppCacheExtensions.GetCacheItem<T>(IAppCache provider, string cacheKey, Func<T> getCacheItem)
UrlTracker.Core.Caching.Memory.Domain.DecoratorDomainProviderCaching.GetDomains()
UrlTracker.Core.Intercepting.Preprocessing.DomainUrlPreprocessor.PreprocessUrlAsync(Url url, IInterceptContext context)
UrlTracker.Core.Intercepting.Preprocessing.InterceptPreprocessorCollection.PreprocessUrlAsync(Url url, IInterceptContext context)
System.Threading.Tasks.ValueTask<TResult>.get_Result()
UrlTracker.Core.Intercepting.IntermediateInterceptService.GetAsync(Url url, IInterceptContext context)
UrlTracker.Core.Caching.Memory.TypedMemoryCache<TKey, TValue>.ExecuteFactoryAsync(Func<Task<TValue>> factory, CancellationTokenSource cts)
UrlTracker.Core.InterceptService.GetAsync(Url url)
UrlTracker.Middleware.UrlTrackerRedirectMiddleware.InvokeAsync(HttpContext context)
UrlTracker.Middleware.UrlTrackerClientErrorTrackingMiddleware.InvokeAsync(HttpContext context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Session.SessionMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
StackExchange.Profiling.MiniProfilerMiddleware.Invoke(HttpContext context) in MiniProfilerMiddleware.cs
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
Umbraco.Cms.Web.Common.Middleware.PreviewAuthenticationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
Umbraco.Cms.Web.Common.Middleware.UmbracoRequestLoggingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
SixLabors.ImageSharp.Web.Middleware.ImageSharpMiddleware.Invoke(HttpContext httpContext, bool retry)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)