Problem with uploading

I have some error in WordPress (theme egofolio), there’s a text/warning in WordPress, it says this (and now I don’t know what to do):

_string(): Entity: line 11: parser error : Opening and ending tag mismatch: hr line 10 and body in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): ^ in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): Entity: line 12: parser error : Opening and ending tag mismatch: body line 8 and html in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): ^ in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83 Warning: simplexml_load_string(): Entity: line 13: parser error : Premature end of data in tag html line 1 in /var/www/vhosts/edwinvandendikkenberg.nl/httpdocs/wp-content/themes/egofolio/libs/inc/update-notice.php on line 83