1. Check if the extension exists
Go to your AbanteCart installation folder:
E:\laragon\www\abante\extensions\
Make sure you see a folder called default_flat_rate_shipping.
If it's missing, copy it from a fresh AbanteCart package of the same version (1.4.2.1).
2. Enable the extension in admin
Log in to Admin Panel.
Go to: Extensions → Shipping.
Find Flat Rate Shipping and make sure it's installed and enabled.
If it's not visible, the files are missing (back to step 1).
3. Clear AbanteCart cache
In admin, go to System → Cache → Clear All.
Also, manually delete everything in /system/cache/ except for index.html.
4. Reset settings if needed
Sometimes the database doesn't have the default config rows for shipping.
In phpMyAdmin, check the table ac_extensions.
Ensure there's an entry for default_flat_rate_shipping.
If not, reinstall the extension from admin or re-import it manually.
5. Debugging tip
If you're still stuck, enable error reporting in system/config.php:
define('DEBUG', 1);
Then reload checkout — it may show which file is missing exactly.
In short: make sure the default_flat_rate_shipping folder exists, enable it in admin, and clear cache. That usually fixes the "Could not load model extension/default_flat_rate_shipping" error on fresh installs.
Go to your AbanteCart installation folder:
E:\laragon\www\abante\extensions\
Make sure you see a folder called default_flat_rate_shipping.
If it's missing, copy it from a fresh AbanteCart package of the same version (1.4.2.1).
2. Enable the extension in admin
Log in to Admin Panel.
Go to: Extensions → Shipping.
Find Flat Rate Shipping and make sure it's installed and enabled.
If it's not visible, the files are missing (back to step 1).
3. Clear AbanteCart cache
In admin, go to System → Cache → Clear All.
Also, manually delete everything in /system/cache/ except for index.html.
4. Reset settings if needed
Sometimes the database doesn't have the default config rows for shipping.
In phpMyAdmin, check the table ac_extensions.
Ensure there's an entry for default_flat_rate_shipping.
If not, reinstall the extension from admin or re-import it manually.
5. Debugging tip
If you're still stuck, enable error reporting in system/config.php:
define('DEBUG', 1);
Then reload checkout — it may show which file is missing exactly.
In short: make sure the default_flat_rate_shipping folder exists, enable it in admin, and clear cache. That usually fixes the "Could not load model extension/default_flat_rate_shipping" error on fresh installs.