Certificate error occurred when installing the fleet server

Looks like you configured the output in kibana.yml file, hence it cannot be modified from Kibana Fleet UI. Please choose one or the other.

This is my Kibana configuration file. How should I modify it

Any reason why you would want to configure the output statically in kibana.yml?

Sorry, I don't know what to do, please tell me

Can you remove xpack.fleet.outputs from kibana.yml and then configure the output in the Kibana > Fleet settings UI? You have to restart kibana after you have made the changes in kibana.yml.

It's successful. Thank you very much for your help these days.

I don't know how to thank you. Anyway, thank you