Warning messages on main page

Hello, I have some trouble with outputing warning messages on main page in footer widget area, when I output CT Recent Comments See the code below and screeonshot:

Warning: trim() expects parameter 1 to be string, array given in /home/makintou/public_html/blog/wp-includes/class-wp-user.php on line 201

Warning: strlen() expects parameter 1 to be string, array given in /home/makintou/public_html/blog/wp-includes/formatting.php on line 2857