On mobile, the banners used on home page does not show the text written on images. We created Product Categories section where we have used Banner option from Eight Theme (Visual Composer). This works fine on desktop but on mobile only images displays but no text.
Check the screenshot.

Another problem now we are facing is that when we edit page and try to edit page using Visual Composer Backend editor it only display a bar showing Visual Composer but no layout of the existing page. Also, if we try to add row or element it only opens the option box but we are not able to add any element.
We are sending the login details so you can check and help us in resolving these issues.
Regards
Vikas