fatal error in prefs page

[Jimmi08]

Clean installation 2.3.1 stable

used French and Spanish land.
on Preferences page:

Fatal error: Uncaught Error: Only variables can be passed by reference in ***\e107_plugins\multilan\admin_config.php:1764 Stack trace: #0 ***\e107_handlers\form_handler.php(6920): status_form_ui->syncLanguages('', 'write', Array) #1 ***\e107_handlers\form_handler.php(7715): e_form->renderElement('syncLanguages', '', Array, Array, 0) #2 ***\e107_handlers\form_handler.php(7540): e_form->renderCreateFieldset('plugin-multilan...', Array, Object(e_plugin_pref), 0) #3 ***\e107_handlers\admin_ui.php(7166): e_form->renderCreateForm(Array, Array, false) #4 ***\e107_handlers\admin_ui.php(6679): e_admin_form_ui->getSettings() #5 ***\e107_handlers\admin_ui.php(2331): e_admin_ui->PrefsPage() #6 ***\e107_handlers\admin_ui.php(1360): e_admin_controller->dispatchPage() #7 ***\e107_plugins\multilan\admin_conf in ***\e107_plugins\multilan\admin_config.php on line 1764