Radarr not accessible any anymore

Sonarr version (exact version):
Mono version (if Sonarr is not running on Windows):
OS: Windows 11
Debug logs:
Description of issue: Radarr was asking for an login that I did not have. So as per FAQ I changed the authentication in the config file to none and restarted Radarr.

After that my browser (Chrome) showed this:

{
“message”: “Requested value \u0027None\u0027 was not found.”,
“description”: “System.ArgumentException: Requested value \u0027None\u0027 was not found.\r\n at System.Enum.TryParseByName(RuntimeType enumType, ReadOnlySpan\u00601 value, Boolean ignoreCase, Boolean throwOnFailure, UInt64\u0026 result)\r\n at System.Enum.TryParseInt32Enum(RuntimeType enumType, ReadOnlySpan\u00601 value, Int32 minInclusive, Int32 maxInclusive, Boolean ignoreCase, Boolean throwOnFailure, TypeCode type, Int32\u0026 result)\r\n at System.Enum.TryParse(Type enumType, ReadOnlySpan\u00601 value, Boolean ignoreCase, Boolean throwOnFailure, Object\u0026 result)\r\n at System.Enum.Parse(Type enumType, String value, Boolean ignoreCase)\r\n at NzbDrone.Core.Configuration.ConfigFileProvider.GetValueEnum[T](String key, T defaultValue, Boolean persist) in ./Radarr.Core/Configuration/ConfigFileProvider.cs:line 259\r\n at NzbDrone.Core.Configuration.ConfigFileProvider.get_AuthenticationRequired() in ./Radarr.Core/Configuration/ConfigFileProvider.cs:line 196\r\n at NzbDrone.Http.Authentication.UiAuthorizationHandler…ctor(IConfigFileProvider configService) in ./Radarr.Http/Authentication/UiAuthorizationHandler.cs:line 22\r\n at DryIoc.Interpreter.TryInterpretSingletonAndUnwrapContainerException(IResolverContext r, Expression expr, ImMapEntry\u00601 itemRef, Object\u0026 result) in //src/DryIoc/Container.cs:line 3089\r\n at DryIoc.Factory.ApplyReuse(Expression serviceExpr, Request request) in //src/DryIoc/Container.cs:line 11110\r\n at DryIoc.Factory.GetExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 11029\r\n at DryIoc.WrappersSupport.GetArrayExpression(Request request) in //src/DryIoc/Container.cs:line 5166\r\n at DryIoc.WrappersSupport.\u003C\u003Ec.\u003CBuildSupportedWrappers\u003Eb__9_0(Request r) in //src/DryIoc/Container.cs:line 5006\r\n at DryIoc.ExpressionFactory.CreateExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 12525\r\n at DryIoc.Factory.GetExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 11012\r\n at DryIoc.ReflectionFactory.CreateExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 12056\r\n at DryIoc.Factory.GetExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 11012\r\n at DryIoc.ReflectionFactory.CreateExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 12056\r\n at DryIoc.Factory.GetExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 11012\r\n at DryIoc.ReflectionFactory.CreateExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 12056\r\n at DryIoc.Factory.GetExpressionOrDefault(Request request) in //src/DryIoc/Container.cs:line 11012\r\n at DryIoc.Container.ResolveAndCache(Int32 serviceTypeHash, Type serviceType, IfUnresolved ifUnresolved) in //src/DryIoc/Container.cs:line 423\r\n at DryIoc.Container.System.IServiceProvider.GetService(Type serviceType) in /_/src/DryIoc/Container.cs:line 341\r\n at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)\r\n at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)\r\n at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)\r\n at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)\r\n at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.\u003CInvoke\u003Eg__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)”
}

No idea what to do next to get back to a working Radarr. Please help. Thanks.

This is the sonarr support forum. Radarr support options are listed here: Radarr