The same is happening on my server when I try to allow gamma change, x3 gathering, and x3 taming....It was a simple fix though of just going into the control panel , under game servers on the survival servers website, then click the orange "modify server config" and go to the bottom and hit reset to default config. I didn't have to dig through files in my ARK folder and this fixes the problem every time I try to change some of the configs. Hope this gets fixed soon bc I would like to get my server set up asap.