Hello,

Just have a look at the screenshots as follows:

1/ Your page front end http://prntscr.com/ja2ogx

2/ Your page backend http://prntscr.com/ja2q7b

3/ This widget is set in the page, view #1

4/ This is your sidebar http://prntscr.com/ja2qrk fill it with other widgets or configure the page correctly.

In any way, sidebar takes its height and the gap in the bottom is generated by the sidebar.

Best Regards