Troubleshooting

Module options show language keys (MOD_…)

• Ensure language/<tag>/mod_mailerlite_newsletter.ini at the site root contains all keys, or reinstall the package.
• Clear Joomla cache after updating language files.

Form submits but nothing happens in MailerLite

• Check MailerLite dashboard for the subscriber; confirm group ID and that the list expects confirmed opt-in if you use double opt-in.

Ajax errors in browser console

• Confirm the module is published and the same site URL is used (avoid mixed http/https).
• Try with caching plugins temporarily disabled for testing.