Search is a view in Splunk that is part of the search app. By default, this search view is available globally, but you might have changed the permission on the view and your user doesn't have access to it. Have you check this?
Otherwise, I would check the permission of the search app as well just in case.
Whatever is after
app/ in the URL is the
search is the default app for all Search Heads. If you try to hand-modify the URL to another app that you know is installed on your Search Head and you get this error, you will have to change some settings. Click on the
gear icon in the upper-left corner of the main landing page next to the word
Apps. Locate your app in the list and check the
Status settings which should be
Enabled. If not, click the
Edit properties link to the right and change them. Then it will work.