In your properties file you have these parameters set with *******. See the same value for username in the log file. Did you have this set to a valid Pega operator/password and just change it before you posted? Please try without any values set for these properties or with a valid operator instead of ****** if that is what you used.
# Use the following properties if you want to use a user's access group
# to determine runtime context instead of the App Requestor's access group
I don't know if you are still having issues with this but I ran into the same error message. There was two changes I made for a successful run. One change was removing the time in the start date and end date properties. The other was setting the expose.declareIndex.accessgroup property and removing the username and password. Hopefully either one of those works for you.