Failure to generate config file results in "success" notification

In the "Methods" page, even when the config file fails to be generated (for example, when clicking the "Get Config" button after a refresh of the page, so the page is completely blank), a notification pops up saying "Configuration file generated successfully", which is misleading.

See the screenshot below for an example:

The error likely resides in the component in `YamlGenerator.tsx`, somewhere in the error-handling logic for when the snackbar should or shouldn't be displayed.