Warnings when adding new site with blog template

I get 2 warnings when adding a new site with a blog template
In the blog template settings I have selected
- WordPress Settings, Current Theme, and Active Plugins
- All Pages
- All Categories
- Files
I have also selected these extra tables
- wp_enewsletter_newsletter
- wp_enewsletter_settings

These are the warnings I get

Warning: json_decode() expects parameter 1 to be string, array given in /home/loudiv5/public_html/mailguru/wp-content/plugins/blogtemplates/blogtemplatesfiles/integration.php on line 398

Warning: Cannot modify header information - headers already sent by (output started at /home/loudiv5/public_html/mailguru/wp-content/plugins/blogtemplates/blogtemplatesfiles/integration.php:398) in /home/loudiv5/public_html/mailguru/wp-includes/pluggable.php on line 1207