Help: GDBus.Error This call is not available inside the sandbox

Hi I try to make my very first snap

This is the app that I’m trying to snap OneDriver Linux. onedriver is a network filesystem that gives your computer direct access to your files on Microsoft OneDrive is not a sync client.

I think I made some progress since the app build and I’m able to install the snap in --devmode, my problem is that when I run the snap a get the fallowing error:

(process:10023): GLib-GIO-WARNING **: 17:12:40.891: GDBus.Error:org.freedesktop.portal.Error.NotAllowed: This call is not available inside the sandbox.

This is a picture of the error:

I’m really stuck in this, I try adding the dbus slot but didn’t work.

Here is the snapcraf.yaml:

name: onedriver # you probably want to 'snapcraft register <name>'
base: core20 # the base snap is the execution environment for this snap
version: '0.1' # just for humans, typically '1.2+git' or '1.3.2'
summary:  A native Linux filesystem for Microsoft OneDrive # 79 char long summary
description: |
  onedriver is a native Linux filesystem for Microsoft OneDrive.

  onedriver is a network filesystem that gives your computer direct access to
  your files on Microsoft OneDrive. This is not a sync client. Instead of
  syncing files, onedriver performs an on-demand download of files when your
  computer attempts to use them. onedriver allows you to use files on OneDrive
  as if they were files on your local computer.

grade: devel # must be 'stable' to release into candidate/stable channels
confinement: devmode # use 'strict' once you have the right plugs and slots
compression: lzo # this line enables LZO compression for the snap

parts:
  onedriver:
    # See 'snapcraft plugins'
    plugin: go
    source: .
    build-packages:
      - gcc
      - git
      - pkg-config
      - libwebkit2gtk-4.0-dev
      - libjson-glib-dev
    stage-packages:
      - libatk-bridge2.0-0
      - libatk1.0-0
      - libatspi2.0-0
      - libbrotli1
      - libcairo-gobject2
      - libcairo2
      - libdatrie1
      - libdrm2
      - libegl1
      - libenchant-2-2
      - libepoxy0
      - libfontconfig1
      - libfreetype6
      - libfribidi0
      - libgbm1
      - libgdk-pixbuf2.0-0
      - libgl1
      - libglvnd0
      - libglx0
      - libgraphite2-3
      - libgstreamer-gl1.0-0
      - libgstreamer-plugins-base1.0-0
      - libgstreamer1.0-0
      - libgtk-3-0
      - libgudev-1.0-0
      - libharfbuzz-icu0
      - libharfbuzz0b
      - libhyphen0
      - libicu66
      - libjavascriptcoregtk-4.0-18
      - libjpeg-turbo8
      - liblcms2-2
      - libnotify4
      - libopengl0
      - libopenjp2-7
      - liborc-0.4-0
      - libpango-1.0-0
      - libpangocairo-1.0-0
      - libpangoft2-1.0-0
      - libpixman-1-0
      - libpng16-16
      - libpsl5
      - libsecret-1-0
      - libsoup2.4-1
      - libthai0
      - libwayland-client0
      - libwayland-cursor0
      - libwayland-egl1
      - libwayland-server0
      - libwebkit2gtk-4.0-37
      - libwebp6
      - libwebpdemux2
      - libwoff1
      - libx11-6
      - libx11-xcb1
      - libxau6
      - libxcb-render0
      - libxcb-shm0
      - libxcb1
      - libxcomposite1
      - libxcursor1
      - libxdamage1
      - libxdmcp6
      - libxext6
      - libxfixes3
      - libxi6
      - libxinerama1
      - libxkbcommon0
      - libxml2
      - libxrandr2
      - libxrender1
      - libxslt1.1

# slots:
#   dbus-daemon:
#     interface: dbus
#     bus: session
#     name: org.freedesktop.systemd1.Manager

plugs:
  config-file:
    interface: system-files
    read:
    - /home
    write:
    - /home

apps:
  onedriver:
    command: bin/onedriver
    extensions:
      - gnome-3-38
    # slots:
    #   - dbus-daemon
    plugs:
      - home
      - desktop
      - desktop-legacy
      - wayland
      - x11
      - process-control
      - network
      - network-bind
      - network-observe
      - system-observe
      - config-file

Thanks for the help, this is my very first attempt to make a snap.