Prosites Error after activating

i can't get past this error when activating newly created site. Fresh install with newest versions.

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

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

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

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

Warning: strip_tags() expects parameter 1 to be string, object given in /home/webg/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/webg/public_html/wp-includes/kses.php on line 1038