Nvidia settings unable to save

Wonder if somebody could help please.
When attempting to save the x configuration file I get the unable to open /etc/x11/xorg.conf error message.
Now I remember fixing this ages ago but for the life of me can't remember what i did, it was a command i entered in terminal from a youtube video which i now cant find. TIA

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I haven't used NVIDIA on Linux at all, but try this?

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After digging around on the internet found this solution that worked for me

Sudo chmod +X /usr/share/screen-resolution-extra/nvidia-polkit

Hope this helps anybody that comes across this issue.

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