I'm in the same case as Joi: I went from Ubuntu 16.04 to Ubuntu 18.04 to Ubuntu 20.04. Removing libsecomp libraries in /lib and the old one in /usr/lib (version 2.3) allowed the system to boot.
I'm in the same case as Joi: I went from Ubuntu 16.04 to Ubuntu 18.04 to Ubuntu 20.04. Removing libsecomp libraries in /lib and the old one in /usr/lib (version 2.3) allowed the system to boot.