Hi Luqman,
that fact that you cannot create/edit a customizing for the OVP configuration is rather strange!
Can you please check the original language of the OVP configuration, then run Web Dynpro application CUSTOMIZE_COMPONENT with URL parameter sap-language=<original language>.
Provide the OVP configuration ID and press "New", resp. "Edit" button.
Is there any difference?
Regards,
Simon