Errors Everytime I activate a plugin

Everytime I activate a plugin, the rating-widget errors out and causes a fatal error. Here is the error:

Fatal error: Call to undefined function fs_text() in C:\Applications\wp.roireporting.com\wp-content\plugins\rating-widget\freemius\includes\class-freemius.php on line 12046
Call Stack
# Time Memory Function Location
1 0.0021 250904 {main}( ) …\plugins.php:0
2 0.0026 286048 require_once( ‘C:\Applications\wp.roireporting.com\wp-admin\admin.php’ ) …\plugins.php:10
3 0.0032 296224 require_once( ‘C:\Applications\wp.roireporting.com\wp-load.php’ ) …\admin.php:31
4 0.0034 302400 require_once( ‘C:\Applications\wp.roireporting.com\wp-config.php’ ) …\wp-load.php:37
5 0.0041 375992 require_once( ‘C:\Applications\wp.roireporting.com\wp-settings.php’ ) …\wp-config.php:94
6 1.4005 59558504 do_action( ) …\wp-settings.php:449
7 1.4005 59558896 WP_Hook->do_action( ) …\plugin.php:453
8 1.4005 59558960 WP_Hook->apply_filters( ) …\class-wp-hook.php:323
9 1.9047 71667384 call_user_func_array:{C:\Applications\wp.roireporting.com\wp-includes\class-wp-hook.php:298} ( ) …\class-wp-hook.php:298
10 1.9048 71667600 Freemius->_add_default_submenu_items( ) …\class-wp-hook.php:298
11 1.9048 71667744 Freemius->get_text( ) …\class-freemius.php:8414