The problem with the withdrawal of materials in the module, but rather with the modes. With some modes, the module refuses to display materials (everything is normal with the standard one), and in the source code it outputs the DIV with the id "GKBLANKIMAGE".
I tried to reinstall, tinkering in the settings, nothing helps. I did all this on the News Show Pro GK5.
I installed GK4, the same problems with it, but it displays the following error:
Warning: Invalid argument for foreach () in /public_html/libraries/src/Document/Renderer/Html/HeadRenderer.php on line 287
I have been fighting this problem for two days already, I will be very happy with your support.