Not working with https

Hi!
We use https for our domain. But chrome shows that connection is not secure, because we have http from yeloni plugin https://joxi.ru/LmGZ3kselOMwrl.jpg .
I tried simply change it from plugin’s source, but it was not so easy.
I found piece of code, that makes change from http to https for this link (https://joxi.ru/brR780fJOq0vm1.jpg) , but:
1. Condition from this code is not working. So it’s not understand that we use https. Moreover, it tries to find nonexistent class ‘yeloni-close-image-url’;
2. I tried to delete condition and change class, but have this error in console – https://joxi.ru/YmELkXh0MlnMr6.jpg

How can I solve this problem?