Hi,
what you do is the definition of the classes and the linking in one step. What you need to do is to separate these
like this:
@startuml
class Example
class Example2
Example "1" -right- "*" Example2 : description
@enduml
or to remove the class keyword and let plantuml do the initialization of the classes like this.
@startuml
Example "1" -right- "*" Example2 : description
@enduml
Both result in :
BR,
Michael