How to create comment or tasks in pull requests with Scriptrunner from Bitbucket v5.9.0?

[rlandes]

I'd like to create tasks when a pull request is created via the Custom Event Handler feature from Bitbucket Scriptrunner, but I couldn't manage to find how to do it so far. I did find solutions on this website but they seem not to apply in v5.9.0, for example this one: https://community.atlassian.com/t5/Bitbucket-questions/How-to-auto-comment-Pull-Requests/qaq-p/266093

Even after replacing

pullRequestService.addComment

with

commentService.addComment

and after importing the right interface, since I noticed the function switched interface between versions (https://docs.atlassian.com/bitbucket-server/javadoc/5.9.0/api/reference/com/atlassian/bitbucket/comment/CommentService.html), it didn't work, I got the following message in the logs:

groovy.lang.MissingMethodException: No signature of method: com.sun.proxy.$Proxy454.addComment() is applicable for argument types: (Integer, Long, String) values

The solutions I found on other questions got the same fate, and I'm still unable to automatically create tasks or even comments right now.

Any solution? Thanks a lot in advance.