Here are some rules you need to compliance:
- You need to install the 64 bit version and only the 64 bit of SAP Nco.
- You need to install the latest version of SAP Nco as well.
- You need to install the .Net 4.0 version of SAP Nco as the data gateway host service and Microsoft SAP Adapter are build with .Net 4.5.
For more details about with SAP Nco version to pick for Azure Logic App, you could refer to this article.
Also, someone gets the same error like you, he download Nco connnector from SAP website and install in server then everything goes well.
You could go to see the similar issue.