I just activated SSL on a website which also uses Visual Composer. I'm using the Really Simple SSL plugin for that. Everything seems to be set up fine but I still don't have the green padlock but the https is grey.
So I tried to figure out what's wrong and found that there are mixed content problems with some Visual Composer images. It says:
Mixed Content: The page at 'https://www.websitename.com/' was loaded over HTTPS, but requested an insecure image 'http://www.websitename.com/wp-content/visualcomposer-assets/elements/singleImage/singleImage/public/loading.gif'. This content should also be served over HTTPS.
The same problem also occurs for close.png, preview.png and next.png of Visual Composer.
How can I fix this? I searched online but couldn't find a solution yet. I use the latest Version of WordPress (4.9.5) and Visual Composer ran an update to 2.4.
Thanks for your help!