Hello toor123, I hope you are doing well. Thanks for being part of GoDaddy Community! I think that you're hosting your site on a shared hosting server and that there are restrictions at the server level that are not allowing you to make the changes you're trying to make. Providing additional details about the type of hosting you have may help someone else provide you with additional suggestions. However, I'd suggest getting in touch with GoDaddy hosting support so they can verify whether or not the changes you're trying to make are possible on the platform you're hosted on.