Using extension in YAML pipelines fails with 405 error

[marcosfriasraet]

Hello.
We are using the extension in azure devops for classic releases and it works perfectly fine :). But i have a question when i try to include the task in a yaml release pipeline we get this error:

Starting: retainRelease

Task : Retain indefinitely current release
Description : This task will allow you to mark the current release to be retained indefinitely
Version : 2.1.0
Author : Mario Majcica
Help : On a successful release to production, usually you will mark the release to be retained for certain amount of time. This task will automate the desired behaviour, by marking the current release to be retained indefinitely.

(node:1824) Warning: Use Cipheriv for counter mode of aes-256-ctr
(node:1824) Warning: Use Cipheriv for counter mode of aes-256-ctr
(node:1824) Warning: Use Cipheriv for counter mode of aes-256-ctr
(node:1824) Warning: Use Cipheriv for counter mode of aes-256-ctr
(node:1824) Warning: Use Cipheriv for counter mode of aes-256-ctr
##[error]Failed request: (405)
Finishing: retainRelease

I've tried using classic azure devosp agents, deployment groups agents and enviroments and always it fails with same issue. Can you confirm that this extension can also be used in YAML? IN such case do you a an idea about the issue?
Thanks a lot for you effort and time.