Plugin do not sync with facebook page events (with The Events Calendar)

Hi !

I installed the plugin Sync facebook events ti synchronise my facebook page events with my website using The Events Calendar plugin.

I tried to modify code of the plugin following instructions here

My website is here :

Click on “Agenda” page.

What should I do ?

Thank you for your help

https://www.ads-software.com/plugins/sync-facebook-events/