Warning Box Backend Error

Hello all,
I’m doing some of my backups to the Box cloud storage (www.box.com). I get often the following warning after a backup:
2020-03-15 13:00:20 +01 - [Warning-Duplicati.Library.Backend.Box.BoxBackend-BoxErrorParser]: Failed to parse error from Box
The backup of the data and also restore looks okay, though.
Can I also simply ignore this warning or could it lead to problems later on?

I forgot to mention that I’m using version 2.0.5.1_beta_2020-01-18 on a Windows 10 Pro machine.
Here is some more information from the log:
16. Mrz. 2020 13:01: HTTP Response: 201 - Created: {"username":"username","ip":"99.152.199.99","backupsetname":"Dokumente ZBOX","deletedFiles":"0","deletedFolders":"0","modifiedFiles":"0","examinedFiles":"5434","openedFiles":"0","addedFiles":"0","sizeOfModifiedFiles":"0","sizeOfAddedFiles":"0","sizeOfExaminedFiles":"1947206274","sizeOfOpenedFiles":"0","notProcessedFiles":"0","addedFolders":"0","tooLargeFiles":"0","filesWithError":"0","modifiedFolders":"0","modifiedSymlinks":"0","addedSymlinks":"0","deletedSymlinks":"0","partialBackup":0,"dryrun":0,"mainOperation":"Backup","parsedResult":"Warning","version":"2.0.5.1 (2.0.5.1_beta_2020-01-18)","endTime":"2020-03-16 13:01:11","beginTime":"2020-03-16 13:00:00","duration":"00:01:11.4618831","log":"\r\n2020-03-16 13:00:22 +01 - [Warning-Duplicati.Library.Backend.Box.BoxBackend-BoxErrorParser]: Failed to parse error from Box\r\nNewtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.\r\nbei Newtonsoft.Json.JsonTextReader.ParseValue()\r\nbei Newtonsoft.Json.JsonReader.ReadForType(JsonContract contract, Boolean hasConverter)\r\nbei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)\r\nbei Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)\r\nbei Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)\r\nbei Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)\r\nbei Duplicati.Library.Backend.Box.BoxBackend.BoxHelper.ParseException(Exception ex)\r\n2020-03-16 13:00:33 +01 - [Warning-Duplicati.Library.Backend.Box.BoxBackend-BoxErrorParser]: Failed to parse error from Box\r\nNewtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.\r\nbei Newtonsoft.Json.JsonTextReader.ParseValue()\r\nbei Newtonsoft.Json.JsonReader.ReadForType(JsonContract contract, Boolean hasConverter)\r\nbei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)\r\nbei Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)\r\nbei Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)\r\nbei Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)\r\nbei Duplicati.Library.Backend.Box.BoxBackend.BoxHelper.ParseException(Exception ex)","result":"Warning","backupset_id":15860,"updated_at":"2020-03-16 13:01:11","created_at":"2020-03-16 13:01:11","id":5116797}

I also created a log capturing Warnings from Box.com. I’m using the same version you are, except on Ubuntu 18.04 LTS. I get the same error:

2020-05-06 22:00:16 -04 - [Warning-Duplicati.Library.Backend.Box.BoxBackend-BoxErrorParser]: Failed to parse error from Box
Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path ‘’, line 0, position 0.
at Newtonsoft.Json.JsonTextReader.ParseValue () [0x002b3] in :0
at Newtonsoft.Json.JsonTextReader.Read () [0x0004c] in :0
at Newtonsoft.Json.JsonReader.ReadAndMoveToContent () [0x00000] in :0
at Newtonsoft.Json.JsonReader.ReadForType (Newtonsoft.Json.Serialization.JsonContract contract, System.Boolean hasConverter) [0x0004a] in :0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000db] in :0
at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00054] in :0
at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in :0
at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in :0
at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in :0
at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in :0
at Duplicati.Library.Backend.Box.BoxBackend+BoxHelper.ParseException (System.Exception ex) [0x0007d] in <5e179c0a25f4477cb070f85347eca227>:0

It seems to be benign in that my backups complete, verify, and can recover files if needed. However, these build up over time if not dealt with.