If You are getting this error after update:

[Thu Jul 09 13:32:08.465065 2015] [lsapi:error] [pid 467230:tid 140242392512256] [client 10.3.13.37:65135] [host loginroot.com] Backend error on sending request(GET / HTTP/1.1); uri(/) content-length(0) (lsphp is killed?): Wrong LSAPI header type: 6 instead of expected 7

That’s because cloudlinux developers modified their lsapi code, and didn’t add variable default value. Very nice guys…

The fix:

Just add the line to /etc/httpd/conf/extra/mod_lsapi.conf (Or other lsapi configuration file in case Your server is not a DA server):

lsapi_backend_accept_notify On

The error should be gone.
Cheers!