Pangolin X11: Failed to open X display

[AbdullahJirjees]

I am having this issue while running the lidar2camera manual calib, I tried the xhost +, I tried all the suggested solutions any idea how to solve this.

[Kuntal491]

@AbdullahJirjees Did you find the solution for this?. I try all possible ways by using xhost and other respository recommended by other issues. Still this Pangolin X11 exist.