I have just updated the Splunk Add-on for Microsoft IIS and am hit with this issue with every search I run now
Could not load lookup=LOOKUP-iis_action_lookup
[indexer1] Could not load lookup=LOOKUP-iis_action_lookup
[indexer2] Could not load lookup=LOOKUP-iis_action_lookup
[indexer3] Could not load lookup=LOOKUP-iis_action_lookup
ect..
The upgrade was from version 1.0.1-1.20, I am running on a linux splunk environment with a SH cluster and an Index Cluster. The issue itself seems straight forward but I confirmed the lookup is on each indexer, and on the deployer .../master-apps/Splunk_TA_microsoft-iis/lookups. Each application version matches on all search heads and indexers.
I'm having the same issue, were you able to fix yours ?
Did you ever figure this out?
Same after upgrading versions - app not on indexer as on HF