I purchased a license and installed the plugin Filter for shipping methods 3.0 on Smartstore 3.0.1. No errors were reported when I installed the plugin in and it shows as "Installed" and "Licensed" in the plug in list.
I then went back to Configuration -- Regional Settings - Shipping Methods and when I open an existing shipping method I get an 404 error with Requested URL: /Plugins/SmartStore.ShippingFilter/FilterOutShippingMethod. On the server I can see the folder /Plugins/SmartStore.ShippingFilter.
The same error occurs when I add a new shipping method and save it.
I did update the resources without an error.
Any idea what could be wrong here?