The ATH is failing (relatively reliably in OSS, but not locally) presumably due to a timing issue.

Failure is due to 
JavaScript error: http://127.0.0.1:65293/static/659022bd/plugin/nodelabelparameter/lib/nodelabel.js, line 48: TypeError: document.querySelector(...) is null

https://github.com/jenkinsci/nodelabelparameter-plugin/blob/5c9da6313133f254b9ce3eb60712afd3294bd6ca/src/main/webapp/lib/nodelabel.js#L48

it may be that the page is being unloaded immediatly after being loaded, or that the ready condition is not correct.  

Possibly the code should be more defensive (check the element is not null before checking a property of it)