Error message:
Restricted shell escape. PlantUML cannot be called. Start pdflatex/lualatex with -shell-escape. @startuml start :Hello world; :This is on defined on several **lines**; stop @enduml
Lines of code:
\usepackage{plantuml}
\begin{plantuml}
@startuml
start
:Hello world;
:This is on defined on
several **lines**;
stop
@enduml
\end{plantuml}
PS! I am using latex-workshop with VS Code.