Edit Page

I am on the process of updating the page. The screen turned white with wrong message as below,
Warning: Invalid argument supplied for foreach() in /home/autotopu/public_html/wp-content/plugins/module-positions/module-positions.php on line 1033

Warning: Invalid argument supplied for foreach() in /home/autotopu/public_html/wp-content/plugins/module-positions/module-positions.php on line 1033

Warning: Cannot modify header information – headers already sent by (output started at /home/autotopu/public_html/wp-content/plugins/module-positions/module-positions.php:1033) in /home/autotopu/public_html/wp-includes/pluggable.php on line 876

What is this how to rectify it?. Someone help me.

Thanks in advance.