api/alerting/rule/{id} responding with "Internal Server Error"

[anmironov]

Kibana version: 7.13.3

Elasticsearch version: 7.13.3

Server OS version:

Browser version:

Browser OS version:

Original install method (e.g. download page, yum, from source, etc.): ESS
Describe the bug:
If you use APIKey and update the rule API (which supports Token-based authentication only) you will get a status code 500 statusCode: 500,
error: 'Internal Server Error',
message: 'An internal server error occurred.'
So it's hard to find the initial error in such request (I mean authentication method).
In case of using APIKey with wrong/fake key - 401 error

Steps to reproduce:

1. Update rule API using APIKey using valid Key - 500 error
2. Update rule API using APIKey using invalid Key - 401 error

Expected behavior:
Not sure, but a non-500 error, but more informative
Screenshots (if relevant):
Valid key

Invalid key

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context:

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[gmmorris]

Seems this is a duplicate and a PR addressing it has been merged: #96683

Closing as it will hopefully be included in the upcoming release.