Use one of these records? [DUPLICATES_DETECTED]

Another error message which doesn't give you much information, this one actually means that there are Duplicate Rules set up for the object you are importing into. Salesforce has recognized the record as a Duplicate and has rejected it from being created / updated.

ECE_SForceDataError: We got an error back from SalesForce when trying to update or insert data in SalesForce: Error returned from SFDC on create: Attributes: type = "DuplicateError" [message: Use one of these records? , statusCode: DUPLICATES_DETECTED , duplicateResult: [allowSave: false , duplicateRule: Standard_Account_Duplicate_Rule , duplicateRuleEntityType: Account , errorMessage: Use one of these records? , matchResults: [entityType: Account , matchEngine: FuzzyMatchEngine , matchRecords: [matchConfidence: 100.0 , record: Attributes: type = "sf:sObject" [type: Account , Id: 0010O00002OfUX0QAN , Id: 0010O00002OfUX0QAN ] ].

You will either need to Disable the Duplicate Rule, or ensure that the records you are Inserting / Updating are not already in Salesforce.