WPBakery Image selection bug

since the latest update of the theme The7 and the plugins the image selection with WPBakery does not work right: I want to change the background image of the row, but instead of the choosen image I only see a red cross and can not choose a new image. (row settings > Background: Image / Parallax, Background Image)
Even if I try to select an image of another row on another page it’s the same bug.
But this bug is only in the row settings, anywhere else I can select an image.
How can I fix this? I don’t have a backup of the page :frowning:
Thank you!

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