Custom Inline Function error : Exception has been thrown by the target of an invocation

Hello,

I created Custom Inline Functions as per the SDK documentation and provided templates.

The functions appear in the workflow editor, however I get an error at running time : "Erreur lors de la construction de la chaîne. Erreur lors de l’exécution de la fonction inline (fn-FormatDateWithCulture)."

Also, in the "Run Now" window, I get the following error : "Error executing inline (fn-FormatDateWithCulture) function. Exception has been thrown by the target of an invocation."

Is there any way to get more detail about this error ?

For information, my function has been unit tested in Visual Studio and works properly.

Thanks in advance.

Best regards