EILRequestFetchPublicLocations NSInvalidArgumentException

When trying to request all public locations I get an NSInvalidArgumentException. Code is as follows:

EILRequestFetchPublicLocations *fetchLocationsRequest = [[EILRequestFetchPublicLocations alloc] init];
[fetchLocationsRequest sendRequestWithCompletion:^(NSArray<EILLocation *> * _Nullable locations, NSError * _Nullable error) {
        if(!error) {
            
        }
        else {
            
        }
}];