If your Magento is hosted on a Windows-based server, you can come across the following issue with the Advanced Reports extension:
When generating a report with a number of filters applied (filtered by several SKUs, custom date range, order ID range, etc. within the same report), you get a "404 Page Not Found" error.
This can result from the Windows server configuration: if multiple filters are set when generating a report, the actual URL query may exceed the maximum URL segment length allowed on your server (this limit is set to 260 symbols by default). Find details on Windows-based server configuration here.
To solve this problem, you should increase the value of the registry key 'UrlSegmentMaxLength' .