This fails because the first getParam call isn't recognized:
tr= getParam('timerange', '2026-06-03T00:00:00.000Z/2026-06-04T00:00:00.000Z' )
#tr= getParam( 'timerange', '2026-06-03', 'timerange to load' )
result= getDataSet( 'vap+das2server:https://planet.physics.uiowa.edu/das/das2Server?B&dataset=Juno/WAV/Survey',tr)
I'm sure this is because there's a Pattern which isn't matched. I've recently started using the Python AST to handle the parsing, and this would be much more reliable.
For now the second form should be used.