We just stood up a new Splunk Light instance, version 7.2.0. I created a search and then saved it as an alert. When I try to change it to anything aside from private, I get the following error message:
In handler 'savedsearch': Data could not be written: /nobody/search/savedsearches/SplunkOnlyAlert/search: host="usoms0090"
The host is the same as the Splunk instance itself.