I'm working to upload some data sets from the splunk tutorial page in order to learn how to use Splunk and am unable to get the datasets fully added and am receiving an error message of: Upload failed with WARN : supplied index 'Web' missing. I have downloaded the zip files from https://docs.splunk.com/Documentation/Splunk/8.2.3/SearchTutorial/Systemrequirements the Add Data process seems to be working fine up until the review page and when I try to Submit it I receive the above error message. I am fairly new to learning Splunk and any assistance anyone can offer would be greatly appreciated.
You are trying to indexing it to index named web, but you probably haven't defined that index earlier. In guide https://docs.splunk.com/Documentation/Splunk/8.2.3/SearchTutorial/GetthetutorialdataintoSplunk they seem to use default index which is main. So try to import data again with default index.
r. Ismo