MySQL Monitor - Performance Tab

MySQL Monitor - Performance Tab

Hello,
I have a MySQL monitor on MariaDB (v10.4 on my test environnement) and I can't get any information in the Performance Tab. I followed all prerequistes available in documentation but I can't figure out what i'm missing. 

Can you explain where the informations that should be shown in this tab are from? And if there is more pre-requisites needed?

Thank you in advance for your help
                New to ADManager Plus?

                  New to ADSelfService Plus?