I already had the first problem, only got rid of it by uninstalling the page builder again,
then reinstalled and only then registered and only then changed the language. I think they have a problem there.
You already have a problem, if you copy a text here, for example a translation, then your input field suddenly hangs, the cursor is somewhere in the text and only after pressing the Enter key several times is the field ready for further input.
On the second point, many of their templates are not up to date, so you sometimes get errors that you don't expect. Or as in your case, they assume a "Pear" installation path, which may be different on your system.