Had the same problem (not sure if I had the same error logs thoug) and managed to find out what was causing it. In my case I messed up when initializing the search heads and gave them the wrong value of the conf_deploy_fetch_url. if that value does not match with the url of the deployer it will not accept the bundle you are trying to push out. run a: splunk edit shcluster-config -conf_deploy_fetch_url ..... and correct the value if its also wrong in your case.
... View more