Unable to upload file via File field #480. Open. staticdreams opened this Issue on Jul 27, 2016 · 20 comments. Attach compressed pdf file (e.g. pdf.zip) to the mail 4. Send the mail to yourself 5. Send action does not complete and returns the error "Error: Unable to upload. Apr 25, 2013 Hello,. I am trying to import a CSV file and it comes up with the following error: Error Importing (Unable to upload file.) Warning: Failed.
Make sure that the file you are trying to upload doesn't contain any special characters, symbols, or spaces within the file name. File names can only contain.