preview image do not appear on the homepage (Sahifa theme)

Hello, I am using Sahifa theme and Wordpress Automatic plugin for Pinterest (pin to pin). I always open websites the same way but this time there is a weird problem. There is no preview image on my homepage. I didn't any different thing than my other websites. I changed my VPS and I was set up again this website. This problem still continues. Also, WordPress Automatic plugin does not run automatically despite of I add cron job. Can you help me, please?
I have added 2 screenshots (normal and problem.)


problem : https://prnt.sc/nl856z
normal : https://prnt.sc/nl84zi