Can’t activate

I can not activate the plugin, because Fatal Error: Fatal error: Uncaught Error: Call to undefined function get_sites() in C:\OSPanel\domains\dist-test\distprice\wp-content\plugins\multisite-clone-duplicator\lib\functions.php:180 Stack trace: #0 C:\OSPanel\domains\dist-test\distprice\wp-content\plugins\multisite-clone-duplicator\include\option.php(16): MUCD_Functions::get_sites() #1 C:\OSPanel\domains\dist-test\distprice\wp-content\plugins\multisite-clone-duplicator\include\option.php(65): MUCD_Option::init_duplicable_option() #2 C:\OSPanel\domains\dist-test\distprice\wp-content\plugins\multisite-clone-duplicator\multisite-clone-duplicator.php(70): MUCD_Option::init_options() #3 C:\OSPanel\domains\dist-test\distprice\wp-includes\class-wp-hook.php(286): MUCD::activate(”) #4 C:\OSPanel\domains\dist-test\distprice\wp-includes\class-wp-hook.php(310): WP_Hook->apply_filters(”, Array) #5 C:\OSPanel\domains\dist-test\distprice\wp-includes\plugin.php(465): WP_Hook->do_action(Array) #6 C:\OSPanel\domains\dist-test\distprice\wp-admin\plugins.php(177): do_action(‘activate_multis… in C:\OSPanel\domains\dist-test\distprice\wp-content\plugins\multisite-clone-duplicator\lib\functions.php on line 180 Wordpress 5.2.2. What can be done about it? This topic was modified 6 years, 10 months ago by coollerok .