DT.select

better to tell us what is not working.

maybe some analysis within the datatable as described below can help:
:ambulance: :sos: [FirstAid] Datatable: Debug & Analysis invalid DateTime Strings / String to DateTime Parsing Issues - News / Tutorials - UiPath Community Forum

here we would suggest

  • to look inside the datatable
  • to prototype the Selext expression in parts directly within the immediate panel

As an alternate we do have also LINQ in place