VCMI 0.99 crashes on start

I’m trying to find a cure. I have now added the IP address to /etc/hosts, so that i do not get the “not found”.

The basic problem is, that i have Ubuntu 20.04.1 LTS, codename “focal”. The list of supported versions contains:

[DIR] artful/ 2018-07-19 21:28 -
[DIR] bionic/ 2020-07-05 10:26 -
[DIR] devel/ 2020-03-18 02:49 -
[DIR] disco/ 2020-03-18 02:49 -
[DIR] oneiric/ 2013-02-18 04:58 -
[DIR] precise/ 2013-02-17 04:03 -
[DIR] quantal/ 2013-02-18 04:58 -
[DIR] raring/ 2013-02-18 04:58 -
[DIR] saucy/ 2013-09-08 00:18 -
[DIR] trusty/ 2020-07-05 10:26 -
[DIR] utopic/ 2014-06-22 15:39 -
[DIR] vivid/ 2017-10-11 15:52 -
[DIR] wily/ 2016-12-12 01:36 -
[DIR] xenial/ 2020-07-05 10:26 -
[DIR] yakkety/ 2017-07-19 22:01 -
[DIR] zesty/ 2018-01-14 21:30 -

There is no focal. So as a result there is no “Release” file. So for security reasons apt blocks downloading from this repository. I do not know all the code names, but i think there is no ppa for the current ubuntu version, only for older versions.
An alternative would be offering a .deb file to download and then install manually. But i have not yet found such a .deb file.

Ok, i found the .deb files. But they depend on some libs i don’t have and which are not available. Mostly older versions of ffmpeg libs.