a problem with revslider plugin

i have a problem with revslider plugin when edit a page:

Fatal error: Uncaught ValueError: strrpos(): Argument #3 ($offset) must be contained in argument #1 ($haystack) in C:\xampp\htdocs\path\wp-content\plugins\revslider\includes\functions.class.php:387 Stack trace: #0 C:\xampp\htdocs\path\wp-content\plugins\revslider\includes\functions.class.php(387): strrpos(”, ‘.’, -1) #1 C:\xampp\htdocs\path\wp-content\plugins\revslider\includes\slide.class.php(2345): RevSliderFunctions->check_valid_image(false) #2 C:\xampp\htdocs\path\wp-content\plugins\revslider\includes\slider.class.php(2278): RevSliderSlide->get_overview_image_attributes(‘gallery’) #3 C:\xampp\htdocs\path\wp-content\plugins\revslider\admin\includes\functions-admin.class.php(212): RevSliderSlider->get_overview_data(Object(RevSliderSlider), Array) #4 C:\xampp\htdocs\path\wp-content\plugins\revslider\admin\includes\functions-admin.class.php(128): RevSliderFunctionsAdmin->get_slider_overview() #5 C:\xampp\htdocs\path\wp-content\plugins\revslider\admin\includes\shortcode_generator\shortcode_generator.class.php(216): RevSliderFunctionsAdmin->get_short_library() #6 C:\xampp\htdocs\path\wp-content\plugins\revslider\admin\includes\shortcode_generator\shortcode_generator.class.php(22): RevSliderShortcodeWizard::add_scripts() #7 C:\xampp\htdocs\path\wp-includes\class-wp-hook.php(307): RevSliderShortcodeWizard::enqueue_scripts(‘post.php’) #8 C:\xampp\htdocs\path\wp-includes\class-wp-hook.php(331): WP_Hook->apply_filters(NULL, Array) #9 C:\xampp\htdocs\path\wp-includes\plugin.php(474): WP_Hook->do_action(Array) #10 C:\xampp\htdocs\path\wp-admin\admin-header.php(118): do_action(‘admin_enqueue_s…’, ‘post.php’) #11 C:\xampp\htdocs\path\wp-admin\edit-form-blocks.php(303): require_once(‘C:\\xampp\\htdocs…’) #12 C:\xampp\htdocs\path\wp-admin\post.php(187): require(‘C:\\xampp\\htdocs…’) #13 {main} thrown in C:\xampp\htdocs\path\wp-content\plugins\revslider\includes\functions.class.php on line 387

Can you help me ?