Hello, when trying to install Essential Grid, Visual Composer, and Revolution Slider, I’m met with the message:

Downloading install package from https://www.mydomain.com/wp-content/themes/luxury-wp/includes/plugins/essential-grid.zip…

Download failed. cURL error 60: SSL certificate problem: self signed certificate

Do you’ve any idea what is taking place here, and how I’m to solve it?

Thanks, hope to hear back soon.