Invalid Set up owner for custom settings

Question

I am trying to retrieve a custom setting that I made with this code:

    public static String getCustomKey(){
        AP_Mobile_Key__c APMobileKey = AP_Mobile_Key__c.getInstance('AP Mobile Key');
        String myCCVal = APMobileKey.Key__c;
        if(APMobileKey != null){
          System.debug(myCCVal);
          return myCCVal;
        }
        return 'No key';
    }

When I try to run it, i get error: Invalid SetupOwner for Custom Settings: AP Mobile Key

These settings exist, I just created them. I cant see to find any reference to this error using Google.

Answer 1

Just to recap how this was fixed:

The error "Invalid SetupOwner for Custom Settings: AP Mobile Key" was due to the custom settings being hierarchical and getinstance was being used incorrectly on Name value, instead of organisation, user or profile id (Refer to more detailed answer in similar question here: Custom Setting providing NULL value)

(If applicable) When changing the custom settings into List type, ensure that call to getinstance method is based on Name value, and that this has corresponding record data