Problem was that C:\Program Files\Splunk\etc\apps\unix\local\inputs.conf was "read only". No idea how it got that way. The error message: "In handler 'localapps': Error performing action=edit on object id=script://$SPLUNK_HOME/etc/apps/unix/bin/cpu.sh in config=inputs." was not specific. There are at least 13 files with "inputs" in the name in the Splunk directory tree. Thanks to Michael Wilde for finding the solution.
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