Hi there, I have a very basic Jenkinsfile (attached) which I am attempting to run. Every time I run the pipeline however, I get the error below from Java (error attached). I assume that this is because the correct plugins and/or versions of said plugins aren't installed on my Jenkins server. However, I am finding it difficult to ascertain a complete list of required plugins.

Would it be possible to have one provided?

If I am going wrong anywhere, please let me know!

Thank you!

Niall.