Hello,

1-This is not an issue of the Visual Composer, but your mixed content. You have active the https but there are many images/files being loaded over http and this gives issues. Just make sure to have all content being loaded over https. Use the .htaccess file to do this.

2-Logo changing: you have different logos(screenshot) for the light header version (default) and responsive version. That’s why the logo too changes according to the change of header type.
I checked the responsive version of site and the logo is displaying ok.

Please keep in mid to use only one builder in a page. Meaning: You can not use shortcodes of Visual Composer and Codeless Builder both in the same page. Use a builder at a time.
Let us know.

Best regards!

Hello,

You have a server error (screenshot). Contact your host and make sure you have all necessary access right to all theme’s and WordPress core files.
-Read this article to learn more on how to speed up your site: https://codeless.co/how-i-increased-more-than-70-the-speed-of-my-website/

-Logo: i checked again and the logo never disappeared. See screen recording: https://jmp.sh/oO4aivd

-Portfolio: Portfolio items can be assigned categories. Then select which categories to show in a portfolio (by selecting them in the portfolio element options). When you click on a portfolio item, you either go to that portfolio profile page, or open the image in a light box. Screenshot: https://ibb.co/1Qwhsb7
Sorry i don’t understand what are you trying to do here..

-WP bakery image gallery:I see what you mean. I have notified the developers and we will check this up.
In the mean time, please use theme’s default builder.

Best regards!