glfw error

/home/dell/anaconda3/envs/DragGAN/lib/python3.8/site-packages/glfw/init.py:834: GLFWError: (65544) b'X11: Failed to open display ' warnings.warn(message, GLFWError) /home/dell/anaconda3/envs/DragGAN/lib/python3.8/site-packages/glfw/init.py:834: GLFWError: (65537) b'The GLFW library is not initialized' warnings.warn(message, GLFWError) python: /builds/florianrhiem/pyGLFW/glfw-3.3.4/src/input.c:832: glfwSetKeyCallback: Assertion `window != ((void *)0)' failed. Aborted (core dumped)