Problems with Nginx when attempting to install other packages

there are certain applications that I try to install on my ubuntu server and I keep running into to nginx issues like this.

I want to fix this. I’m just started to use nginx so I’m new to this.

Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
invoke-rc.d: initscript nginx, action "start" failed.
dpkg: error processing package nginx-core (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of nginx:
 nginx depends on nginx-core (>= 1.10.0-0ubuntu0.16.04.4) | nginx-full (>= 1.10.0-0ubuntu0.16.04.4) | nginx-light (>= 1.10.0-0ubuntu0.16.04.4) | nginx-extras (>= 1.10.0-0ubuntu0.16.04.4); however:
  Package nginx-core is not configured yet.
  Package nginx-full is not installed.
  Package nginx-light is not installed.
  Package nginx-extras is not installed.
 nginx depends on nginx-core (<< 1.10.0-0ubuntu0.16.04.4.1~) | nginx-full (<< 1.10.0-0ubuntu0.16.04.4.1~) | nginx-light (<< 1.10.0-0ubuntu0.16.04.4.1~) | nginx-extras (<< 1.10.0-0ubuntu0.16.04.4.1~); however:
  Package nginx-core is not configured yet.
  Package nginx-full is not installed.
  Package nginx-light is not installed.
  Package nginx-extras is not installed.

dpkg: error processing packagNo apport report written because the error message indicates its a followup error from a previous failure.
e nginx (--configure):
 dependency problems - leaving unconfigured
Setting up clamav-base (0.99.2+dfsg-0ubuntu0.16.04.1) ...
/etc/mail/aliases: 2 aliases, longest 4 bytes, 24 bytes total
Setting up libllvm3.6v5:amd64 (1:3.6.2-3ubuntu2) ...
Setting up libclamav7 (0.99.2+dfsg-0ubuntu0.16.04.1) ...
Setting up clamav-freshclam (0.99.2+dfsg-0ubuntu0.16.04.1) ...
Setting up clamav (0.99.2+dfsg-0ubuntu0.16.04.1) ...
Setting up clamav-daemon (0.99.2+dfsg-0ubuntu0.16.04.1) ...
Setting up clamdscan (0.99.2+dfsg-0ubuntu0.16.04.1) ...
Processing triggers for libc-bin (2.23-0ubuntu5) ...
Processing triggers for systemd (229-4ubuntu13) ...
Processing triggers for ureadahead (0.100.0-19) ...
Errors were encountered while processing:
 nginx-core
 nginx
E: Sub-process /usr/bin/dpkg returned an error code (1)

Here is the results of “systemctl status nginx.service”

nginx.service - A high performance web server and a reverse proxy server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Wed 2017-02-15 15:17:27 UTC; 1min 40s ago

Feb 15 15:17:26 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
Feb 15 15:17:26 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] listen() to 0.0.0.0:80, backlog 511 failed (98: Address already in use)
Feb 15 15:17:26 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
Feb 15 15:17:27 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] listen() to 0.0.0.0:80, backlog 511 failed (98: Address already in use)
Feb 15 15:17:27 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] listen() to [::]:80, backlog 511 failed (98: Address already in use)
Feb 15 15:17:27 wordpress-2gb-nyc3-01 nginx[18334]: nginx: [emerg] still could not bind()
Feb 15 15:17:27 wordpress-2gb-nyc3-01 systemd[1]: nginx.service: Control process exited, code=exited status=1
Feb 15 15:17:27 wordpress-2gb-nyc3-01 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
Feb 15 15:17:27 wordpress-2gb-nyc3-01 systemd[1]: nginx.service: Unit entered failed state.
Feb 15 15:17:27 wordpress-2gb-nyc3-01 systemd[1]: nginx.service: Failed with result 'exit-code'.