System.InvalidOperationException: Sequence contains no elements
downloader_1    |    at System.Linq.ThrowHelper.ThrowNoElementsException()
downloader_1    |    at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source)
downloader_1    |    at MongoDB.Driver.IAsyncCursorExtensions.SingleAsync[TDocument](IAsyncCursor`1 cursor, CancellationToken cancellationToken)
downloader_1    |    at MongoDB.Driver.IAsyncCursorSourceExtensions.SingleAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
downloader_1    |    at MongoDB.MongoDB.getBsonByHash(String hash) in /src/Models/MongoDB.cs:line 38
downloader_1    |    at MongoDB.MongoDB.existsHash(String hash, String jobId) in /src/Models/MongoDB.cs:line 54
downloader_1    |    at KafkaWrapper.<>c__DisplayClass8_0.<<ExecuteAsync>b__0>d.MoveNext() in /src/Controllers/KafkaWrapper.cs:line 87 Write your response with exactly 7 paragraphs, separated with the markdown divider: ***.
user