Issue

The following error message appears in the checkout when trying to place an order in your Magento store:

There seems to be a problem with the module. Please flash or disable the cache storage and retry. If this did not help, change the authorization method to PaymentPage and contact sellxed.

This happens when the JavaScript is not executed properly within the checkout. This means that the JavaScript which is listening on the order confirmation button is not executed.

Resolution

Try to clear the Magento cache. If the error persists please try the following things:

1. Clear your browser cache and retry.
2. In System > Configuration > Advanced > Developer you should disable the merging of JavaScript and CSS files. Set both options to No. By merging the JavaScript file the module's JavaScript may get corrupted.
3. In System > Tools > Compilation the compiler should be deactivated. The compiler may prevent the injection of the JavaScript into the checkout page.
4. Make sure sure your web server has the correct permissions to read the module files. Normally the unix permissions 0755 for directories and 0644 for files should be correct.
5. The loading can also be caused by the Magento theme. The theme may block the injection of the module's JavaScript into the checkout page. Try to switch to the default theme. When the error is gone the issue is located within your theme.
6. When you are not using the standard checkout please switch to the standard checkout. If the error is gone you may need to get in contact with the checkout provider to clarify why the JavaScript is not injected.