Could not start any capture backend #89

[FluxCast Doctor] System capability report
[FluxCast Doctor] Miracast/WFD looks possible via NetworkManager; raw supplicant access is optional for this backend.
 Status Check Details
 ------ ---------------------- ------------------------------------------
 ok python runtime (3.14.6 on Linux 7.1.6-arch1-1)
 ok ffmpeg video/audio transcoding (/usr/bin/ffmpeg)
 ok wf-recorder Wayland/wlroots screen capture (/usr/bin/wf-recorder)
 ok xdg-desktop-portal Wayland portal stack is running (xdg-desktop-portal-kde)
 ok pactl PulseAudio/PipeWire-Pulse audio monitor detection (/usr/bin/pactl)
 ok xrandr X11 monitor detection fallback (/usr/bin/xrandr)
 ok nmcli NetworkManager Wi-Fi Direct control (/usr/bin/nmcli)
 ok dnsmasq NetworkManager P2P DHCP server (/usr/bin/dnsmasq)
 ok iw kernel Wi-Fi interface inspection (/usr/bin/iw)
 ok wpa_cli active Wi-Fi Direct scan/control (/usr/bin/wpa_cli)
 ok gdbus passive wpa_supplicant D-Bus capability checks (/usr/bin/gdbus)
 ok gst-launch-1.0 optional future WFD GStreamer pipeline (/usr/bin/gst-launch-1.0)
 ok gst-inspect-1.0 optional future WFD codec inspection (/usr/bin/gst-inspect-1.0)
 ok gst element pipewiresrc Wayland portal GStreamer capture source (pipewiresrc)
 ok gst element x264enc Wayland portal GStreamer H.264 encoder (x264enc)
 ok dbus_next WFD portal capture control plane for KDE/GNOME Wayland (python module is installed)
 ok ffmpeg encoders H.264 and AAC encoders are available (h264=libx264, h264_vaapi, h264_nvenc, h264_qsv, h264_v4l2m2m; aac=yes)
 ok screen capture X11 capture path is available (DISPLAY=:1; xrandr=/usr/bin/xrandr)
 warn audio capture default audio sink was not reported (Connection failure: Connection refused | pa_context_connect() failed: Connection refused)
 ok NetworkManager Wi-Fi and P2P devices are visible (nmcli tool, version 1.58.0-1; wlan0:wifi:connected | lo:loopback:connected (externally) | p2p-dev-wlan0:wifi-p2p:disconnected | enp1s0:ethernet:unavailable)
 ok P2P subnet no interface overlaps the Wi-Fi Direct subnet 192.168.49.0/24
 ok iw P2P kernel exposes a P2P-device interface
 ok wpa_supplicant P2P wpa_supplicant reports P2P support ((<['ap', 'ibss-rsn', 'p2p', 'interworking', 'pmf', 'mesh', 'fils', 'fils_sk_pfs', 'ft', 'sha384', 'owe', 'suiteb192', 'wep_disabled']>,))
 ok wpa_supplicant WFD wpa_supplicant accepts Wi-Fi Display IEs ((<@ay []>,))
 warn firewall (firewalld) firewalld is running but port 7236/tcp is closed (open it with: sudo firewall-cmd --add-port=7236/tcp --permanent && sudo firewall-cmd --reload)

=======================================================
 FluxCast - Desktop → Smart TV via UPnP/DLNA
=======================================================
[FluxCast] Available monitors to capture:
 # Monitor Display Resolution Position Refresh
 ---- ------------ -------- -------------- -------------- --------
 [0] eDP-1 :1 2880x1800 0,0 120.0 Hz ← active
Select monitor [0]: 
[FluxCast] Session detected: type=x11, desktop=KDE, wm=unknown
[FluxCast] Capture backend: x11grab
[FluxCast] Capturing X11 region : :1+0,0 (2880x1800)
[FluxCast] Capture backend x11grab failed, trying fallback...
[FluxCast] Session detected: type=x11, desktop=KDE, wm=unknown
[FluxCast] Capture backend: wf-recorder
[FluxCast] Capturing Wayland monitor : eDP-1 (2880x1800)
[FluxCast] Output: 1920x1080, audio: default
[FluxCast] ERROR: Could not start capture backend (x11grab: x11grab capture exited immediately; wf-recorder: wf-recorder exited immediately)