Hummingbird 1.7 Causes Internal Server 500 Error

After upgrading to Hummingbird 1.7 the server fails to run script. Error Log provides this feedback Thu Nov 02 09:14:28 2017] [error] [client XXX.XXX.XXX.XXX] Premature end of script headers: php-latest referer: http://mysite.com/wp-admin/admin.php?page=wpmudev-plugins [Thu Nov 02 09:14:43 2017] [error] [client XXX.XXX.XXX.XXX] Premature end of script headers: php-latest
Deactivated all the plugins including WPMUDEV Dashboard and activated default WordPress theme and then tried to activate the Hummingbird but it leads to Internal Server 500 Error