Any updates on diagnosing indexer failures?

I found this:
https://go2docs.graylog.org/5-0/getting_in_log_data/indexer_and_processing_failures.html?tocpath=Setting%20up%20Graylog|Getting%20Started|Indexer%20Failures|_____1

via:

Problem is I can’t find that setting. The documentation only talks about the web interface, but that seems to have changed. I searched the Configurations site with strg + f for “fail” with no result.

Version: Graylog 5.1.5

To my understanding there should be (as of ~ Aug 4, 2022) an option to enable storing messages where indexing failed. But I can’t find any hint of that in my Graylog. Is it an Enterprise feature?

Edit:
I guess almost, Operations seems to be another type of paid plan If I understand this correctly.

You are correct. It appears that is a paid/licensed feature.

However, any sort of errors like that should still be viewable in graylog’s server.log