After several hours of research, I think that I found the cause of a problem that I have to execute macros command from my Behringer x32 compact :
Create a macro with a name containing accents (ex : é, è, …etc)
Assign the macro to a MIDI controller (in my case, my x32) in the MIDI remote tab
Trigger the macro from the midi controller : the signal seems to be received because I see the feedback of GUI of Cubase but the macros is never executed
Now, try to rename the macro without space, accent or special chars and retry the process. Now the macros is correctly triggered
With the midi remote assistant I think, I never used JavaScript with Cubase (but I’m interested if you have a link to the documentation for this because I’m developer).