Can’t Activate AMP Page Builder Compatibility Extension

I have a WordPress site which has been built using Divi (linked here – https://eflowglobal.com/ )

I downloaded the AMP for WP Plugin and purchased AMP Pagebuilder Compatibility extension to create an AMP version of the site. I have activated the license for the Page Builder Compatibility extension (see pictures here
– https://eflowglobal.com/wp-content/uploads/2019/11/activated.png
– https://eflowglobal.com/wp-content/uploads/2019/11/license.png ).

However, when I try and turn on the extension in the AMP for WP settings, I get the following error message, which says ‘ONE LAST STEP REQUIRED: This feature requires Page Builder for AMP Extension’ ( see picture here – https://eflowglobal.com/wp-content/uploads/2019/11/Divi-Builder.png ).

I’ve tried deleting and reuploading the plugins, deactivating and reactivating the extension, and still nothing.

Can anybody advise me on this? Why hasn’t the Pagebuilder Extension activated properly, even though my license says it has.

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