I am trying to get a remote style sheet working.
I have the following:
@startuml
<style file=https://www.advdelphisys.com/PlantUML/maley20250123.css>
start
:ClickServlet.handleRequest();
:new page;
if (Page.onSecurityCheck) then (true)
:Page.onInit();
if (isForward?) then (no)
:Process controls;
if (continue processing?) then (no)
end
endif
stop
header: some header
footer: some footer
caption some caption
@enduml
Throws the following error.

The url for the *.css file is valid.
How can I fix this?