Hey there.
I would suggest providing the full logs from your Jenkins pipeline, redacting information as neccessary.
And, your version is past EOL. You should upgrade to either the latest version or the current LTS at your earliest convenience. Your upgrade path is:
9.7 → 9.9.1 → 10.1 (last step optional)
You may find these resources helpful:
If you have questions about upgrading, feel free to open a new thread for that here.