recently we started having issues with uploading files to sp using DN/SS, here's what the log says:
2022-03-28 1380:952 | Information | Generating output process finished.
2022-03-28 1380:968 | Detailed | Executing Connector(s)
2022-03-28 1380:983 | Detailed | Parsing connector settings
2022-03-28 1380:983 | Detailed | Parsing variables
2022-03-28 1380:999 | Detailed | Uploading document to Sharepoint server...
2022-03-28 138:43:425 | Error | Upload failed: Value does not fall within the expected range.
2022-03-28 138:43:441 | Information | Finished workflow process on the document (Documents archive)
2022-03-28 138:43:441 | Detailed | Cleaning workflow process files and folders (Documents archive)
2022-03-28 138:43:488 | Error | Workflow isn't processed successfully, reason: Connector failed, check log for details.
2022-03-28 138:43:488 | Detailed | Max number of processing attempts reached: 1, the document will be moved out of the processing queue
2022-03-28 138:43:503 | Detailed | Workflow 'Documents archive' end
Most of the time the file actually gets uploaded but without the metadata (except the file name, which is fine).