I get a "cannot connect to X server " error when trying to remote debug

I'm trying to run a remote script by creating a remote interpreter configuration in the project settings. I CAN run the script but I CAN NOT debug it.  

When I try to debug, this is what I see in the Console:

ssh://user@remote:22/home/user/anaconda3/bin/python3 -u /home/user/.pycharm_helpers/pydev/pydevd.py --multiproc --qt-support --client '0.0.0.0' --port 53700 --file /var/www/script.py
pydev debugger: process 4293 is connecting

Connected to pydev debugger (build 143.1559)
: cannot connect to X server

Process finished with exit code 1

Regards.