@paleewawa you should accept this answer as a solution if it works for you also 🙂 ... View more

Try removing the port number at the end if you are using Splunk Cloud. This was the issue in my case. The documentation does not reflect this issue as of this writing. ... View more

Try using single quotes for each parameter. This is how I fixed my error. Example: >./splunk add monitor /var/log -index 'main' -sourcetype 'linux' ... View more