No se puede instalar Nginx en Ubuntu 18.04.3

No se puede instalar Nginx en Ubuntu 18.04.3

Soy un recién llegado a la configuración de servidores y parece que no puedo instalar nginx en mi servidor Ubuntu 18.04.3 (LTS) x64 de Digitalocean. Intenté leer otras entradas pero ninguna de las soluciones parece funcionar para mí. Intenté desinstalar y reinstalar pero siempre obtengo la misma respuesta.

sudo apt-get install nginx
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 nginx : Depends: nginx-core (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-full (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-light (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed or
                  nginx-extras (< 1.14.0-0ubuntu1.7.1~) but it is not going to be installed
         Depends: nginx-core (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-full (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-light (>= 1.14.0-0ubuntu1.7) but it is not going to be installed or
                  nginx-extras (>= 1.14.0-0ubuntu1.7) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

¡Cualquier ayuda sería muy apreciada!

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