I too have the same issue. I tried all of the suggestions, but cannot get the tutorial data to load. I always receive the same Upload failed with Error: Read Timeout ... View more

@philips66 I have added an answer to your question. If you are trying to upload a folder instead of single file you would get the above error. Also if you have non UTF-8 encoded file binary file then also you would get the above error. If you are uploading a single file and it is not binary, then would you be able to share the screenshot of the ERROR along with the file from tutorial that you are trying to upload? You can share image through any image sharing site like imgur and post the link to your original queation: https://answers.splunk.com/answers/793469/unspecified-upload-error-refresh-and-try-again-1.html ... View more

Please check the file properties/settings and permission! If the file is create or extracted via root, the permission should be changed! Hope that it helps. ... View more