RT 4.4.4./Apache only works if I start it in a certain way

I am wondering why my apache2 on ubuntu 16.04 starts when I use “sudo apachectl start” and not “sudo service apache2 start?”

If I use the second command, apache cashes with an error in 14 in libnss_files-2.23.so (I am using mod_ssl).

What are the differences between those 2 commands?