I am having the same problem. However, SA-Eventgen does not show up under my Local Inputs heading.
I went into Apps>SA-Eventgen>Permissions and changed the "Sharing for config file-only objects" to All apps and this seemed to correct the problem as the Index=main search generated data (not sure if it was the right data). However, going to the very next search in the book, index=main /bookings/confirmation earliest=-24h@h | timechart count span=15m did not return any results.
I feel like there is something wrong with the loaded samples but I did it exactly like the original poster.
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