hello and welcome to the forum,
have you seen
Rclone auto mount systemctl plex cant plex files - #2 by asdffdsa
if you are not 1000% of --allow-non-empty, then remove it.
rclone mount gdrive: /mnt/unionfs --allow-other --allow-non-empty --log-level DEBUG --vfs-cache-mode
if that simple command works, then, for testing, use that with systemd.
note: that is not a valid command as --vfs-cache-mode is missing a value off|minimal|writes|full
--cache-tmp-upload-path is not for rclone mount, so remove that.
post the full output
and can you post the full systemd service file, enclosing with three backticks so it is formated like so
[Unit]
Description=RClone Service
Wants=network-online.target
After=network-online.target
[Service]
Type=notify
Environment=RCLONE_CONFIG=/opt/rclone/rclone.conf
KillMode=none
RestartSec=5
ExecStart=/usr/bin/rclone mount gcrypt: /GD \
--allow-other \
--dir-cache-time 5000h \