WordPress unable to connect and site problem

I did exactly as instructed in installation guide, but facing two problems:

1. After plugin activation, my site does not show any post image and sliders are not working
2. I put crm site details, but WordPress is unable to connect
– URL format I used: https://crm.prosperamundi.eu/service/v4_1/rest.php
– admin user and password are working fine

I am using WP 4.3, Divi theme by Elegantthemes, Windows based server.

CRM version used: SuiteCRM ver. 7.3

Please advise what I did wrong.

Thx!

Mario

https://www.ads-software.com/plugins/sugarcrmsuitecrm-customer-portal/