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That would be in the AIOS module's control panel. On the admin Navigation pane, click the Manage Extensions. From the list of extensions shown, click the Edit icon for All in One Shipping. On the module's administration control panel, General tab, Debugging, select "Debug Enabled (Verbose)".

The All in One Shipping module has a Debug setting. Choose to see a Very Verbose explanation. The debug analysis will show why there were no shipping rates found to satisfy the required conditions.