pi@raspberrypi:~ $ sudo apt-get purge openmediavault
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  beep chrony collectd collectd-core cpufrequtils cron-apt dctrl-tools dmeventd hdparm jfsutils jq
  libcpufreq0 libdevmapper-event1.02.1 libfile-slurp-perl libhiredis0.14 libjavascript-minifier-xs-perl
  libjq1 libjs-extjs6 libjson-perl liblocale-po-perl liblvm2cmd2.03 libmemcached11 libmemcachedutil2
  libnss-myhostname libonig5 lvm2 netplan.io nfs-kernel-server nginx php-bcmath php-fpm php-mbstring
  php-pam php-yaml php7.3-bcmath php7.3-fpm php7.3-mbstring proftpd-basic proftpd-mod-vroot
  python-dnspython python3-cached-property python3-dialog python3-msgpack python3-natsort
  python3-netifaces python3-pycryptodome python3-pyudev python3-systemd python3-yaml quotatool rrdcached
  salt-common salt-minion samba samba-vfs-modules sdparm smartmontools socat sshpass tdb-tools wsdd
  xmlstarlet
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  openmediavault*
0 upgraded, 0 newly installed, 1 to remove and 3 not upgraded.
3 not fully installed or removed.
After this operation, 9492 kB disk space will be freed.
Do you want to continue? [Y/n] y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_GB.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_GB.UTF-8").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 233201 files and directories currently installed.)
Removing openmediavault (5.5.9-1) ...
Setting up nginx-full (1.14.2-2+deb10u3) ...
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.
● 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 Mon 2020-09-07 19:15:54 BST; 49ms ago
     Docs: man:nginx(8)
  Process: 7241 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
  Process: 7242 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)

Sep 07 19:15:52 raspberrypi nginx[7242]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:15:52 raspberrypi nginx[7242]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:15:53 raspberrypi nginx[7242]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:15:53 raspberrypi nginx[7242]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:15:53 raspberrypi nginx[7242]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:15:53 raspberrypi nginx[7242]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:15:54 raspberrypi nginx[7242]: nginx: [emerg] still could not bind()
Sep 07 19:15:54 raspberrypi systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
Sep 07 19:15:54 raspberrypi systemd[1]: nginx.service: Failed with result 'exit-code'.
Sep 07 19:15:54 raspberrypi systemd[1]: Failed to start A high performance web server and a reverse proxy server.
dpkg: error processing package nginx-full (--configure):
 installed nginx-full package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of nginx:
 nginx depends on nginx-full (<< 1.14.2-2+deb10u3.1~) | nginx-light (<< 1.14.2-2+deb10u3.1~) | nginx-extras (<< 1.14.2-2+deb10u3.1~); however:
  Package nginx-full is not configured yet.
  Package nginx-light is not installed.
  Package nginx-extras is not installed.
 nginx depends on nginx-full (>= 1.14.2-2+deb10u3) | nginx-light (>= 1.14.2-2+deb10u3) | nginx-extras (>= 1.14.2-2+deb10u3); however:
  Package nginx-full is not configured yet.
  Package nginx-light is not installed.
  Package nginx-extras is not installed.

dpkg: error processing package nginx (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 nginx-full
 nginx
E: Sub-process /usr/bin/dpkg returned an error code (1)
pi@raspberrypi:~ $ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  beep chrony collectd collectd-core cpufrequtils cron-apt dctrl-tools dmeventd hdparm jfsutils jq
  libcpufreq0 libdevmapper-event1.02.1 libfile-slurp-perl libhiredis0.14 libjavascript-minifier-xs-perl
  libjq1 libjs-extjs6 libjson-perl liblocale-po-perl liblvm2cmd2.03 libmemcached11 libmemcachedutil2
  libnss-myhostname libonig5 lvm2 netplan.io nfs-kernel-server nginx php-bcmath php-fpm php-mbstring
  php-pam php-yaml php7.3-bcmath php7.3-fpm php7.3-mbstring proftpd-basic proftpd-mod-vroot
  python-dnspython python3-cached-property python3-dialog python3-msgpack python3-natsort
  python3-netifaces python3-pycryptodome python3-pyudev python3-systemd python3-yaml quotatool rrdcached
  salt-common salt-minion samba samba-vfs-modules sdparm smartmontools socat sshpass tdb-tools wsdd
  xmlstarlet
0 upgraded, 0 newly installed, 62 to remove and 3 not upgraded.
2 not fully installed or removed.
After this operation, 242 MB disk space will be freed.
Do you want to continue? [Y/n] y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_CTYPE = "UTF-8",
	LANG = "en_GB.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_GB.UTF-8").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 231648 files and directories currently installed.)
Removing nginx (1.14.2-2+deb10u3) ...
Removing beep (1.4.3-2) ...
Removing chrony (3.4-4) ...
Removing collectd (5.8.1-1.3) ...
Removing collectd-core (5.8.1-1.3) ...
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Removing cpufrequtils (008-1.1) ...
Removing cron-apt (0.13.0) ...
Removing salt-minion (3001.1+ds-1) ...
Removing dctrl-tools (2.24-3) ...
Removing lvm2 (2.03.02-3) ...
Warning: Stopping lvm2-lvmpolld.service, but it can still be activated by:
  lvm2-lvmpolld.socket
Removing hdparm (9.58+ds-1) ...
Removing jfsutils (1.1.15-4) ...
Removing jq (1.5+dfsg-2+b1) ...
Removing libcpufreq0 (008-1.1) ...
Removing liblocale-po-perl (0.27-2) ...
Removing libfile-slurp-perl (9999.26-1) ...
Removing proftpd-mod-vroot (0.9.4-2) ...
Removing proftpd-basic (1.3.6-4+deb10u5) ...
Removing libhiredis0.14:armhf (0.14.0-3) ...
Removing libjavascript-minifier-xs-perl (0.11-1+b4) ...
Removing libjq1:armhf (1.5+dfsg-2+b1) ...
Removing libjs-extjs6 (6.2.0.981-2) ...
Removing libjson-perl (4.02000-1) ...
Removing libmemcachedutil2:armhf (1.0.18-4.2) ...
Removing libmemcached11:armhf (1.0.18-4.2) ...
Removing libnss-myhostname:armhf (241-7~deb10u4+rpi1) ...
Checking NSS setup...
Removing libonig5:armhf (6.9.1-1) ...
Removing netplan.io (0.95-2) ...
Removing nfs-kernel-server (1:1.3.4-2.5+deb10u1) ...
Removing php-bcmath (2:7.3+69) ...
Removing php-fpm (2:7.3+69) ...
Removing php-mbstring (2:7.3+69) ...
Removing php-pam (1.0.3-1+deb10u1) ...
Removing php-yaml (2.0.2+1.3.1-4+b1) ...
Removing php7.3-bcmath (7.3.19-1~deb10u1) ...
Removing php7.3-fpm (7.3.19-1~deb10u1) ...
Removing php7.3-mbstring (7.3.19-1~deb10u1) ...
Removing samba (2:4.9.5+dfsg-5+deb10u1+rpi1) ...
Removing python-dnspython (1.16.0-1) ...
Removing python3-cached-property (1.5.1-3) ...
Removing python3-dialog (3.4.0-1) ...
Removing salt-common (3001.1+ds-1) ...
Removing python3-msgpack (0.5.6-1+b1) ...
Removing python3-natsort (6.0.0-1) ...
Removing python3-netifaces (0.10.4-1+b1) ...
Removing python3-pycryptodome (3.6.1-2+b1) ...
Removing python3-pyudev (0.21.0-1) ...
Removing python3-systemd (234-2+b1) ...
Removing python3-yaml (3.13-2) ...
Removing quotatool (1:1.6.2-5) ...
Removing rrdcached (1.7.1-2) ...
Removing samba-vfs-modules:armhf (2:4.9.5+dfsg-5+deb10u1+rpi1) ...
Removing sdparm (1.10-1) ...
Removing smartmontools (6.6-1) ...
Removing socat (1.7.3.2-2) ...
Removing sshpass (1.06-1) ...
Removing tdb-tools (1.3.16-2+b1) ...
Removing wsdd (0.5-1) ...
Removing xmlstarlet (1.6.1-2) ...
Removing dmeventd (2:1.02.155-3) ...
Removing liblvm2cmd2.03:armhf (2.03.02-3) ...
Removing libdevmapper-event1.02.1:armhf (2:1.02.155-3) ...
Setting up nginx-full (1.14.2-2+deb10u3) ...
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.
● 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 Mon 2020-09-07 19:17:12 BST; 58ms ago
     Docs: man:nginx(8)
  Process: 9954 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
  Process: 9956 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)

Sep 07 19:17:10 raspberrypi nginx[9956]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:17:10 raspberrypi nginx[9956]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:17:11 raspberrypi nginx[9956]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:17:11 raspberrypi nginx[9956]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:17:11 raspberrypi nginx[9956]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Sep 07 19:17:11 raspberrypi nginx[9956]: nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
Sep 07 19:17:12 raspberrypi nginx[9956]: nginx: [emerg] still could not bind()
Sep 07 19:17:12 raspberrypi systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
Sep 07 19:17:12 raspberrypi systemd[1]: nginx.service: Failed with result 'exit-code'.
Sep 07 19:17:12 raspberrypi systemd[1]: Failed to start A high performance web server and a reverse proxy server.
dpkg: error processing package nginx-full (--configure):
 installed nginx-full package post-installation script subprocess returned error exit status 1
Processing triggers for libc-bin (2.28-10+rpi1) ...
Processing triggers for man-db (2.8.5-2) ...
Errors were encountered while processing:
 nginx-full
E: Sub-process /usr/bin/dpkg returned an error code (1)