[Bug] Warning appear when open pricing feature table

Hello,

I'm using wordpress 4.2.3 and pro site 3.5.0.4

PHP warning appear at this URL: http://bagus.in/wp-admin/network/admin.php?page=psts-pricing-settings&tab=comparison_table

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Warning: Illegal string offset 'level' in /home/bagus/public_html/wp-content/plugins/pro-sites/pro-sites-files/modules/premium-plugins.php on line 493

Best regards,
Tomy