Transmission doesn't start for for error while loading shared libraries

Ciao, I'm using Ubuntu 18.04 and Transmission app doesn't start by clicking on the icon (it seems loading up in the first seconds but then crash). So I launched it in the terminal and I got the following error message:
"transmission-gtk: error while loading shared libraries: libminiupnpc.so.10: cannot open shared object file: No such file or directory"

I also read the similar discussion reported in question #213860 (https://answers.launchpad.net/ubuntu/+source/transmission/+question/213860) but with the solution explained here I'm not able to solve my problem.

Here below you can find the output of some commands for more details:

pcvincenzo@pcvincenzo:~ $ uname -a
Linux pcvincenzo 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:09:48 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

pcvincenzo@pcvincenzo:~ $ lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic

pcvincenzo@pcvincenzo:~ $ sudo dpkg --audit
No output

pcvincenzo@pcvincenzo:~ $ apt-cache policy transmission transmission-gtk libminiupnpc10
transmission:
  Installato: 2.92-3ubuntu2
  Candidato: 2.92-3ubuntu2
  Tabella versione:
 *** 2.92-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu bionic/universe i386 Packages
        100 /var/lib/dpkg/status
transmission-gtk:
  Installato: 2.92-3ubuntu2
  Candidato: 2.92-3ubuntu2
  Tabella versione:
 *** 2.92-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
libminiupnpc10:
  Installato: 1.9.20140610-4ubuntu2
  Candidato: 1.9.20140610-4ubuntu2
  Tabella versione:
 *** 1.9.20140610-4ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

The same problem was encountered with the package installed from your PPA:

pcvincenzo@pcvincenzo:~ $ apt-cache policy transmission transmission-gtk libminiupnpc10
transmission:
  Installato: (nessuno)
  Candidato: 2.94-1ubuntu1~18.04.1
  Tabella versione:
     2.94-1ubuntu1~18.04.1 500
        500 http://ppa.launchpad.net/transmissionbt/ppa/ubuntu bionic/main amd64 Packages
        500 http://ppa.launchpad.net/transmissionbt/ppa/ubuntu bionic/main i386 Packages
     2.92-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu bionic/universe i386 Packages
transmission-gtk:
  Installato: 2.94-1ubuntu1~18.04.1
  Candidato: 2.94-1ubuntu1~18.04.1
  Tabella versione:
 *** 2.94-1ubuntu1~18.04.1 500
        500 http://ppa.launchpad.net/transmissionbt/ppa/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status
     2.92-3ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
libminiupnpc10:
  Installato: 1.9.20140610-4ubuntu2
  Candidato: 1.9.20140610-4ubuntu2
  Tabella versione:
 *** 1.9.20140610-4ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
        100 /var/lib/dpkg/status

Could you please give support ?
Thank you