Widget Page Breaks and Plugin Scripts Displays

1. Widget Page Breaks

-When trying to edit a widget, the widget page refreshes and seems like trying to load the homepage inside the widget page http://prntscr.com/bksp43.

2. Plugin Scripts Displays

-When trying to quick edit a post or a page after clicking update button it displays a script below http://prntscr.com/bkspgf.

Both this errors disappear when I deactivate the plugin.

Please help!

Thanks!

https://ww.wp.xz.cn/plugins/simple-301-redirects/