address comments

crates/goose-cli/src/commands/configure.rs

@@ -249,6 +249,7 @@ pub fn toggle_systems_dialog() -> Result<(), Box<dyn Error>> {
     // Let user toggle systems
     let selected =
         cliclack::multiselect("enable systems: (use \"space\" to toggle and \"enter\" to submit)")
+            .required(false)
             .items(
                 &system_status
                     .iter()

crates/goose-cli/src/commands/session.rs

@@ -61,9 +61,17 @@ pub async fn build_session<'a>(
         );
     }
 
-    let config = Config::load().unwrap_or_else(|_| {
+    let config_path = Config::config_path().expect("should identify default config path");
+
+    if !config_path.exists() {
         println!("No configuration found. Please run 'goose configure' first.");
         process::exit(1);
+    }
+
+    let config = Config::load().unwrap_or_else(|_| {
+        println!("The loaded configuration from {} was invalid", config_path.display());
+        println!(" please edit the file to make it valid or consider deleting and recreating it via `goose configure`");
+        process::exit(1);
     });
 
     let (provider_name, model_name) = get_provider_and_model(provider, model, &config);