Unable to get Salesforce ClientID and SecretID

I'm attempting to use Outh authentication for my PHP request to Salesforce but I can't get my ClientID and SecretID for my app.
I normally have an option to View these values but for some reason I'm unable to view them with an administrator login.
I created a new App and was able to get the credentials successfully, so I know it's not the account permissions preventing me from accessing this information.
Does anyone with experience of Salesforce have any experience with an inability to get these details?
Thanks!