buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c set -e\napt-get update\napt-get install -y --no-install-recommends \\\n ca-certificates curl bzip2 \\\n libasound2t64 libva2 libva-drm2 libva-x11-2 libvdpau1 libegl1 libgl1 \\\n libxcb-cursor0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 \\\n libxcb-randr0 libxcb-render-util0 libxcb-shape0 libxcb-xinerama0 \\\n libxcb-xkb1 libxkbcommon-x11-0 libnss3 libfontconfig1 libdbus-1-3\n\nTARBALL_URL=$(curl -fsSL \\\n https://raw.githubusercontent.com/flathub/tv.plex.PlexHTPC/master/tv.plex.PlexHTPC.yml \\\n | grep -oE 'https://artifacts\\.plex\\.tv/plex-htpc-stable/[^ ]+-linux-x86_64\\.tar\\.bz2' \\\n | head -n1)\n\nif [ -z \"$TARBALL_URL\" ]; then\n echo \"Failed to resolve Plex HTPC tarball URL from Flathub manifest\" >&2\n exit 1\nfi\n\necho \"Downloading Plex HTPC from $TARBALL_URL\"\nmkdir -p /opt/plex-htpc\ncurl -fsSL \"$TARBALL_URL\" -o /tmp/plex-htpc.tar.bz2\ntar -xjf /tmp/plex-htpc.tar.bz2 -C /opt/plex-htpc\nrm -f /tmp/plex-htpc.tar.bz2\n\n# Tarball may extract into a single top-level directory — flatten it.\nif [ ! -f /opt/plex-htpc/Plex.sh ]; then\n INNER=$(find /opt/plex-htpc -mindepth 1 -maxdepth 1 -type d | head -n1)\n if [ -n \"$INNER\" ] && [ -f \"$INNER/Plex.sh\" ]; then\n mv \"$INNER\"/* /opt/plex-htpc/\n rmdir \"$INNER\"\n fi\nfi\n\nif [ ! -x /opt/plex-htpc/Plex.sh ]; then\n echo \"Plex.sh launcher missing from tarball layout\" >&2\n ls -la /opt/plex-htpc >&2\n exit 1\nfi\n\nln -sf /opt/plex-htpc/Plex.sh /usr/local/bin/plex-htpc\n\napt-get autoremove -y\nrm -rf /var/lib/apt/lists/*\n" did not complete successfully: exit code: 22