Undefined Index

I have Widget Options and Extended Widget Options, and have updated both to the latest version and I’m getting this notice all over my page:

Notice: Undefined index: acf in /home/www…/wp-content/plugins/extended-widget-options/includes/widgets/display.php on line 365

I saw that other people were having trouble with a similar error, but it says I’m up to date, so I have to assume this is a newer issue. Please let me know how to correct this.
Thank you