Spectrum is not displaying

Hi Vicky,
Thanks for the reply. I have rectified the OpenGL installation issue. But I got the following error.

File “/home/nmrware/ccpnmr_new/ccpnmr3.1.0/miniconda/lib/python3.8/site-packages/OpenGL/contextdata.py”, line 40, in getContext
raise error.Error(
OpenGL.error.Error: Attempt to retrieve context when no valid context

Can you guide me how to solve this issue?

Madhan Kumar