This morning I decided to install ELK 7.9.1 and all beats from scratch. This is a clean installation. I just setup Auditbeat and Heartbeat to test Uptime and Security. Uptime is displaying the error "Internal Server Error" and Security is displaying the error "Data Fetch Failure", and when click on "See the full error(s)" you can see the know error that we were talking about from the start.
Not sure where the root issue is, but after importing the index template (either with setup or manually with curl) I can see the mappings seems to be right, but then data is being indexed apparently with errors, causing Uptime and Security can't work properly.
This issue started after I upgraded to ELK 7.9.1 and upgraded the beats to match same version. Could this be a bug on this version?
If you have more ideas or steps for troubleshooting, please help me.
Thank you