@emrecaglar if you need any help to set it up please let me know - I went through some of problems with this combo (it's a bit more problematic than RetroPie for Pi :)).
For sure you can change priviliges for config files as you won't be able to save any config in RetroArch:

sudo chmod -R 777 /opt/retropie/configs/

Please just be mindful that this way you give access to this files and folders to EVERYONE which means that if someone connects to your computer then it has full access to all files and folders in this path.
In my case it does not matter as I don't have constant network access to this device (it sits in arcade cab with no lan/wifi) so not much of a deal for me :)

@helloThere Well that’s weird. Mine is completely empty. Hopefully the image attaches correctly but the box has no code in it like yours. Maybe I missed a step?666C68D6-5BA0-45D6-8402-FC7B9A265938.jpeg

@mitu
Testing the frame rate, stayed a steady 60fps..
No clue where the sound issue is coming from but it's always done it with this game..

@woody440 https://retropie.org.uk/forum/topic/3/read-this-first

@buzz
That did the trick! Thanks!

Kind regards
Toke

@backstander
Interestingly enough, it seems retroarch.cfg does not exist in my system and that may be what's causing the issue 0_o

I'm gonna try resetting to defaults and see what happens! Thanks!

@Waylander oh I see what you mean now.

@edmaul69 Belated thanks here. I had an older version and a full update had me stumped for a week. Your solution worked like a charm. :)