Did not expect any exception, but found OpenSearch.Net.UnexpectedOpenSearchClientException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Tests.Reproduce.GitHubIssue5363.<>c.<DiagnosticListener_AuditTrailIsValid>b__1_0(IApiCallDetails data) in /home/runner/work/opensearch-net/opensearch-net/tests/Tests.Reproduce/GitHubIssue5363.cs:line 81 at Tests.Reproduce.GitHubIssue5363.TestDiagnosticListener.<OnNext>b__9_1(KeyValuePair`2 v) in /home/runner/work/opensearch-net/opensearch-net/tests/Tests.Reproduce/GitHubIssue5363.cs:line 56 at OpenSearch.Net.Diagnostics.TypedDiagnosticObserverBase`2.System.IObserver<System.Collections.Generic.KeyValuePair<System.String,System.Object>>.OnNext(KeyValuePair`2 value) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Diagnostics/TypedDiagnosticObserverBase.cs:line 93 at System.Diagnostics.DiagnosticListener.Write(String name, Object value) at System.Diagnostics.DiagnosticSource.StopActivity(Activity activity, Object args) at OpenSearch.Net.Diagnostics.Diagnostic`2.Dispose() in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Diagnostics/Diagnostic.cs:line 76 at OpenSearch.Net.RequestPipeline.Ping(Node node) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Transport/Pipeline/RequestPipeline.cs:line 420 at OpenSearch.Net.Transport`1.Ping(IRequestPipeline pipeline, Node node) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Transport/Transport.cs:line 260 at OpenSearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Transport/Transport.cs:line 100 --- End of inner exception stack trace --- at OpenSearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/Transport/Transport.cs:line 119 at OpenSearch.Net.OpenSearchLowLevelClient.DoRequest[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Net/OpenSearchLowLevelClient.cs:line 94 at OpenSearch.Client.OpenSearchClient.DoRequest[TRequest,TResponse](TRequest p, IRequestParameters parameters, Action`1 forceConfiguration) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Client/OpenSearchClient.cs:line 151 at OpenSearch.Client.OpenSearchClient.Search[TDocument](ISearchRequest request) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Client/OpenSearchClient.NoNamespace.cs:line 873 at OpenSearch.Client.OpenSearchClient.Search[TDocument](Func`2 selector) in /home/runner/work/opensearch-net/opensearch-net/src/OpenSearch.Client/OpenSearchClient.NoNamespace.cs:line 859 at Tests.Reproduce.GitHubIssue4573.<>c.<SerializePercentageScore>b__0_0() in /home/runner/work/opensearch-net/opensearch-net/tests/Tests.Reproduce/GitHubIssue4573.cs:line 43 at FluentAssertions.Specialized.FunctionAssertionHelpers.NotThrow[T](Func`1 subject, String because, Object[] becauseArgs).