Problem with Slider Revolution

Because you’re using a commercial plugin, please use their official support channel. We feel they are best equipped to support their products.

https://www.themepunch.com/support-center/essential-grid/

Commercial products are not supported in these forums.

Thank you for your reply, Steven. The Slider Revolution was bundled with WB. I bought a license now, but don’t know where to activate it on my site.

Bundled with… Where did you get “WB” in the first place? Approache them for support. If by “WB”, you mean “WP”, no, it’s not “bundled with WordPress”. It may have come with your theme. In any case, RevSlider is not supported here, regardless of the state of your license or purchase.