[From string (line 6) ]                                                                                                                                                      
                                                                                                                                                                             
@startuml                                                                                                                                                                    
skinparam Backgroundcolor transparent                                                                                                                                        
                                                                                                                                                                             
                                                                                                                                                                             
                                                                                                                                                                             
                                                                                                                                                                             
                                                                                                                                                                             
    state A                                                                                                                                                                  
    A : <size:10>**Some formatting headline...**</size>                                                                                                                      
    state B                                                                                                                                                                  
    B : <size:10>**Some formatting headline...**</size>                                                                                                                      
    state C                                                                                                                                                                  
    C : <size:10>**Some formatting headline...**</size>                                                                                                                      
    state D                                                                                                                                                                  
    D : <size:10>**Some formatting headline...**</size>                                                                                                                      
    state ...                                                                                                                                                                
^^^^^                                                                                                                                                                        
 You should send a mail to plantuml@gmail.com or post to https://plantuml.com/qa with this log (V1.2025.5beta1) java.lang.IllegalStateException (Assumed diagram type: state)