i install a Xamp and there a clean joomla 3.9.27. i downloaded jsn_pagebuilder4_j3.x_1.3.4_install.zip an try to install it there. At the end at "Install dependency package"
it ends up with an Error: "0 count(): Argument #1 ($var) must be of type Countable|array, null given " and i can't get it run.
I cant "build" a page cause there is no "new" button or annything else.
Whats wrong and how can i sove this?
Tnx in advanced