Conflict with Superfish menus

How to reproduce:
- Clean Drupal installation.
- Install Superfish.
- Install Menuperformance.

After that, when you configure a Superfish menu block, the dropdown to assign a menu to that block is displayed with no values in the form.

Disabling Menuperformance, values into the mentioned dropdown are displayed normally with all the available menus in the system.

How can I solve it? Thanks!