Hi, it appears this issue occurs when users upgrade to Woo 2.6. Here’s a post on the Simplify blog about fixing the issue: smplfy.cm/24SL8lx
Hi Yassinidesign,
If you have a question regarding Simplify Commerce features and services, please direct them to their support team: http://smplfy.cm/email
This plugin was built independently from the Simplify Commerce team and may not be up to date on the latest features.