@RameshMukka
Sorry for the delay, for Encodian support it is best to contact the support team direct - support@encodian.com ... I only participate on the forums when the normal working days allows the time.
Standard and Premium connectors to not determine third party costs. Standard connectors are a group of connectors which are available if you have access to P/A... to access Premium connectors you need additional Microsoft P/A licenses (above those provided by a Microsoft 365 E* license). You may then also need licenses from the connector supplier (such as Encodian) regardless of whether it is a standard / premium connector.
Encodian to provide a 'Free' plan, and paid plans for higher throughput.
Ref your issue; can you please supply either the test file to support@encodian.com so we can review.
If this was broken we'd have thousands of very unhappy customers 🙂