[Russell Sobie]

Here's all the odd stuff I see with that image:

Looks like your login name is "Owner" which... is unexpected.

Also, not sure why there's two backslashes before \\cfg in that path... might be a Kunos error in the error message (lol)... but your path should look more like this:

C:\Users\[yourLoginName]\Documents\Assetto Corsa\cfg\controllers\presets\Default.ini

And lastly... have you made that particular file read only? Assuming it exists, right click on it and select Properties. Should look like this. Make sure "Read-only" isn't checked.