Sometimes ES index field will be {[ContentltemVersionld, null]}, should skip it.

[engine5d]

OC Version 2.1.6

Class : ElasticQuerySource line: 86 to 90

foreach (var document in docs.TopDocs) { results.Add(new JsonObject(document.Select(x => KeyValuePair.Create(x.Key, (JsonNode)JsonValue.Create(x.Value.ToString()))))); }

The x.Value sometimes is null, so throw exception. could change code like following foreach (var document in docs.TopDocs) { results.Add(new JsonObject(document.Select(x => KeyValuePair.Create(x.Key, (JsonNode)JsonValue.Create("" + x.Value))))); }

[MikeAlhayek]

Do you want to create a PR? Probably this is the fix: x.Value?.ToString()

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