Can't play RTSP stream from Ip Camera

Context:

-On Ubuntu 18.04.1 LTS (with beaver GUI)

-Closed the firewall using the terminal

$ sudo ufw disable

-GStreamer is installed with base and good plugins

-The RTSP link of the ip camera is

rtsp://user:pass123@192.168.10.116:554/videoMain

Question

When I try to play the RTSP stream of my ip camera using the following command

gst-launch-1.0 playbin uri=rtsp://user:pass123@192.168.10.116:554/videoMain

I get errors and the player doesn't open...

What am I doing wrong?