I need your help! I setup a multisite website per your

I need your help!
I setup a multisite website per your documentation. I have setup many the same and have encountered no issue. On this setup (on inmotionhosting) when I try to "add a new site" it gives me the following errors below.

Warning: preg_match() expects parameter 2 to be string, object given in /home/expressdemos/public_html/wp-includes/formatting.php on line 3435

Warning: preg_match() expects parameter 2 to be string, object given in /home/expressdemos/public_html/wp-includes/formatting.php on line 3424

Warning: preg_match() expects parameter 2 to be string, object given in /home/expressdemos/public_html/wp-includes/formatting.php on line 3435

Warning: strip_tags() expects parameter 1 to be string, object given in /home/expressdemos/public_html/wp-includes/formatting.php on line 3407

Warning: strip_tags() expects parameter 1 to be string, object given in /home/expressdemos/public_html/wp-includes/formatting.php on line 3407

Catchable fatal error: Object of class WP_Error could not be converted to string in /home/expressdemos/public_html/wp-includes/kses.php on line 1038