I have seen this error showing up in the docker container logs:
in <e31b230dbd29407fadcc55713e0bbd0f>:0
[Fatal] SonarrErrorPipeline: Request Failed. GET /api/v3/wanted/missing
[v3.0.9.1549] System.ArgumentException: Instance property 'episodes' is not defined for type 'NzbDrone.Core.Tv.Episode'
Parameter name: propertyName
at System.Linq.Expressions.Expression.Property (System.Linq.Expressions.Expression expression, System.String propertyName) [0x00051] in <f6c405b973804b5c804e7e759353765f>:0
at NzbDrone.Core.Datastore.Extensions.PagingSpecExtensions.CreateExpression[TModel] (System.String propertyName) [0x00043] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Datastore\Extensions\PagingSpecExtensions.cs:36
at NzbDrone.Core.Datastore.Extensions.PagingSpecExtensions.OrderByClause[TModel] (NzbDrone.Core.Datastore.PagingSpec`1[TModel] pagingSpec) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Datastore\Extensions\PagingSpecExtensions.cs:11
at NzbDrone.Core.Tv.EpisodeRepository.GetMissingEpisodesQuery (NzbDrone.Core.Datastore.PagingSpec`1[TModel] pagingSpec, System.DateTime currentTime, System.Int32 startingSeasonNumber) [0x0000d] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Tv\EpisodeRepository.cs:216
at NzbDrone.Core.Tv.EpisodeRepository.EpisodesWithoutFiles (NzbDrone.Core.Datastore.PagingSpec`1[TModel] pagingSpec, System.Boolean includeSpecials) [0x0000d] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Tv\EpisodeRepository.cs:111
at NzbDrone.Core.Tv.EpisodeService.EpisodesWithoutFiles (NzbDrone.Core.Datastore.PagingSpec`1[TModel] pagingSpec) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\NzbDrone.Core\Tv\EpisodeService.cs:152
at Sonarr.Http.SonarrRestModule`1[TResource].ApplyToPage[TModel] (System.Func`2[T,TResult] function, NzbDrone.Core.Datastore.PagingSpec`1[TModel] pagingSpec, System.Converter`2[TInput,TOutput] mapper) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\Sonarr.Http\SonarrRestModule.cs:43
at Sonarr.Api.V3.Wanted.MissingModule.GetMissingEpisodes (Sonarr.Http.PagingResource`1[TResource] pagingResource) [0x001e7] in M:\BuildAgent\work\63739567f01dbcc2\src\Sonarr.Api.V3\Wanted\MissingModule.cs:40
at Sonarr.Http.REST.RestModule`1[TResource].<set_GetResourcePaged>b__36_0 (System.Object options) [0x00000] in M:\BuildAgent\work\63739567f01dbcc2\src\Sonarr.Http\REST\RestModule.cs:139
at Nancy.NancyModule+<>c__DisplayClass14_0`1[T].<Get>b__0 (System.Object args) [0x00047] in <e31b230dbd29407fadcc55713e0bbd0f>:0
at Nancy.NancyModule+<>c__DisplayClass16_0`1[T].<Get>b__0 (System.Object args, System.Threading.CancellationToken ct) [0x00047] in <e31b230dbd29407fadcc55713e0bbd0f>:0
at Nancy.Routing.Route`1[T].Invoke (Nancy.DynamicDictionary parameters, System.Threading.CancellationToken cancellationToken) [0x00017] in <e31b230dbd29407fadcc55713e0bbd0f>:0
at Nancy.Routing.DefaultRouteInvoker.Invoke (Nancy.Routing.Route route, System.Threading.CancellationToken cancellationToken, Nancy.DynamicDictionary parameters, Nancy.NancyContext context) [0x00086] in <e31b230dbd29407fadcc55713e0bbd0f>:0
at Nancy.Routing.DefaultRequestDispatcher.Dispatch (Nancy.NancyContext context, System.Threading.CancellationToken cancellationToken) [0x002b7] in <e31b230dbd29407fadcc55713e0bbd0f>:0
at Nancy.NancyEngine.InvokeRequestLifeCycle (Nancy.NancyContext context, System.Threading.CancellationToken cancellationToken, Nancy.Bootstrapper.IPipelines pipelines) [0x0011d] in <e31b230dbd29407fadcc55713e0bbd0f>:0