All 3 of your posts likely have to do with your account not having sufficient permissions for the app. A user must have "write" permissions to an app to modify objects.
I'd walk through a few troubleshooting steps at this point. Have whoever your Splunk Admin on site try to do whatever it is that you're trying to do in the app. If he/she is able to do it, then you can derive it is likely a permission issue.
If he/she can't perform the task, I'd have him/her take a look to make sure the objects used in that app are not set to private and instead shared or set to global depending on how you're using it.
May also be worth while to explore some of the splunkd.log messages surrounding the that app.
I also see "Rebuild Machine to Site Lookup File" is conditional on the presence of the file "lookuphostsite.csv". Have you verified this file exists in your lookups and/or if you have write permissions to it?
Access controls ->
New and create a role called
can_outputfile and add to it the
output_file capability. Then go to your
User and add this new