Did you save the fuse.conf file? That error means the last line for the user_allow_other isn’t in the fuse.conf.
felix@gemini:~$ cat /etc/fuse.conf
# /etc/fuse.conf - Configuration file for Filesystem in Userspace (FUSE)
# Set the maximum number of FUSE mounts allowed to non-root users.
# The default is 1000.
#mount_max = 1000
# Allow non-root users to specify the allow_other or allow_root mount options.
user_allow_other