Fatal error on install

Hi,

just tried to install the plugin, but it ended with this:

Fatal error: Uncaught TypeError: Argument 1 passed to Freemius::get_api_user_scope_by_user() must be an instance of FS_User, boolean given, called in /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php on line 20787 and defined in /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php:20801 Stack trace: #0 /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php(20787): Freemius->get_api_user_scope_by_user(false) #1 /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php(20826): Freemius->get_api_user_scope(false) #2 /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php(18016): Freemius->get_current_or_network_user_api_scope() #3 /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-fr in /usr/local/www/apache24/noexec/alkohol-ade.com/wp-content/plugins/user-menus/freemius/includes/class-freemius.php on line 20801

Any idea?

Thanks, Bernd