The connection to the database failed ! Please edit the "app/config/config.php" file and make sure your database connection details are correct! why i cant even install it ?
--- UPDATE ---
Dear Merchant, we updated our infrastructure and now everything work as expected. If you need any help feel free to write an email and sorry for this service interruption.
Dear Merchant, Since we get featured on the Shopify App Store we are experiencing a huge load on our servers, so we are working hard to fix everything. If you encounter any problem, please retry to install the app or contact us and we will happy to answer you. We apologize for the inconvenience.