In order to display content on your page, PageLines needs to sections to be active, these sections are active by default. So if you're experiencing this issue, you have most likely disabled these sections on your template.
Go to Wordpress Admin Dashboard > PageLines > Drag and Drop, now click on "Page Templates" (so it highlights blue) and then select the template that your page(s) are using. Make sure that the "Content Section" is active.
Now click on "Content Area" (next to "Page Template", so that highlights blue), then make sure that the "PostLoop section" is active.
Make sure that both sections area active on your template areas, if they aren't your content will not be visible.
If these sections are active on your templates, then you have most likely disabled these sections on your pages PageLines Meta Settings, go to Wordpress Admin Dashboard > Pages and select your page. Now scroll down to the PageLines Meta Settings > Page Setup and make sure that these sections or not hidden (checked).