flatpak: RogerRouter 2.4.2 fails to start (crash in libsoup-3.0.so.0.7.4) on Ubuntu 24.04

I'm using Ubuntu 24.04.4 with flatpak version 2.4.2 of Roger Router.

On Ubuntu 20.04. it worked, after installing the version 24.04.4 I get following output when running flatpak run org.tabos.roger :

(Roger Router:2): GLib-GObject-CRITICAL **: 01:54:10.279: invalid (NULL) pointer instance

(Roger Router:2): GLib-GObject-CRITICAL **: 01:54:10.279: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(Roger Router:2): libsoup-CRITICAL **: 01:54:10.279: soup_message_get_metrics: assertion 'SOUP_IS_MESSAGE (msg)' failed

(Roger Router:2): GLib-GObject-CRITICAL **: 01:54:10.279: g_object_freeze_notify: assertion 'G_IS_OBJECT (object)' failed

/var/log/syslog has:

2026-02-13T01:54:10.280819+01:00 host kernel: roger[81499]: segfault at 100 ip 000077d2830ab0a3 sp 00007ffde891e9b0 error 4 in libsoup-3.0.so.0.7.4[670a3,77d283060000+5d000] likely on CPU 10 (core 4, socket 0) 
2026-02-13T01:54:10.280860+01:00 teolith kernel: Code: 1f 84 00 00 00 00 00 f3 0f 1e fa 55 48 89 e5 41 55 41 54 53 48 89 fb 48 83 ec 08 4c 63 25 69 bd 03 00 49 01 fc e8 5d 91 fb ff <49> 8b 7c 24 10 e8 63 ac fb ff 31 d2 31 f6 48 89 df e8 47 ff ff ff

So it seems to me that libsoup-3.0.so.0.7.4 is connected to the problem. Anything I can do to help?