Didn’t work properly to integrate my TalentLMS Courses as WooCommerce Products

First thing, Could you please update this plugin. Maybe Its not compatible with WP version 5+.
Second Thing,
I have more than 18 courses in our TalentLMS Account. When I have clicked on the REFRESH COURSES LIST button and select all courses then clicked on INTEGRATE button, Only some courses(3 or 4 only) have been integrated. Couldn’t be integrated the ALL Courses as WooCommerce Product.
Frequently, I have clicked on Re-sync link for individual courses but didn’t work.
How to fix this issue? Could you please give me some advice or help.
Thank you!!!