NUnit Publisher fails: Remote call on connection failed

[DDSGooch]

Jenkins and plugins versions report

Environment

Jenkins: 2.303.3
OS: Linux - 4.9.0-7-amd64
Java: 11.0.13 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
---
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workflow-scm-step:2.13
workflow-step-api:2.24
workflow-support:3.8
ws-cleanup:0.39

What Operating System are you using (both controller, and any agents involved in the problem)?

Linux

Reproduction steps

Unfortunately it's difficult to reproduce reliably but is happening more often, possibly because the number of Unit tests is growing.

Expected Results

Tests should be published successfully

Actual Results

Publish NUnit test result report (self time 17s)
Recording NUnit tests results
Error in NUnit processing: Remote call on JNLP4-connect connection from 10.9.25.117/10.9.25.117:49694 failed

Anything else?

Unfortunately I can't provide much more useful information but if you can advise how to get logs or debug information, that would be much appreciated. Thanks

[jonesbusy]

Please consider upgrade your Jenkins Core to a supported version and take the latest version of the plugin.