Upnp with Gstreamer not working

Hi,

I’ve setup a raspberry Pi3B+ with Balenasound.
SUPERVISOR VERSION: 15.1.0
CURRENT RELEASE: 3.9.6+rev3
From there on, I’ve enabled the upnp plugin in the docker-compose and pushed it again to the device.
Technically everything seems fine, but when I try play an AAC stream (with the bubblepnp app on my phone) I get errors in my logs (see below). I’m a bit lost where to continue now (eg like can I update the gstreamer or are there any other issues? )
zemst_little-afternoon-2023-12-19t15_01_39+01_00.txt (83.7 KB)

upnp gmediarender 0.0.7-git started [ gmediarender 0.0.7-git (libupnp-1.8.4; glib-2.58.1; gstreamer-1.14.4) ].
upnp ERROR [2023-12-19 08:49:50.473043 | gstreamer] uridecodebin1: Error: Your GStreamer installation is missing a plug-in. (Debug: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1:
upnp ERROR [2023-12-19 08:49:56.659920 | gstreamer] uridecodebin1: Error: Your GStreamer installation is missing a plug-in. (Debug: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1:
upnp ERROR [2023-12-19 08:52:28.521283 | gstreamer] uridecodebin1: Error: Your GStreamer installation is missing a plug-in. (Debug: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1:
upnp ERROR [2023-12-19 08:52:34.221310 | gstreamer] uridecodebin1: Error: Your GStreamer installation is missing a plug-in. (Debug: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1:
upnp ERROR [2023-12-19 08:52:34.221310 | gstreamer] uridecodebin1: Error: Your GStreamer installation is missing a plug-in. (Debug: gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:play/GstURIDecodeBin:uridecodebin1: