Unable to add datasource to Gateway Cluster

Hi,

I am trying to add an SQLServer database to my gateway cluster as new data source. But I am getting an error (details given below) 

Unable to connect: We encountered an error while trying to connect to . Details: "We could not register this data source for any gateway instances within this cluster. Please find more details below about specific errors for each gateway instance."

Status code:	400
Error Code:	DMTS_PublishDatasourceToClusterErrorCode

There was an error in the data gateway.
Underlying error message:	Error occurred while decoding OAEP padding.
DM_ErrorDetailNameCode_UnderlyingHResult:	-2146233296

In the same server instance, there are other databases and earlier I have added them without any issue. Now when I tried to add a new database as a new data source, I am getting the error mentioned above. 

I have tested the gateway and all the data sources in that and everything is working fine. One additional information is that I tried to test the issue whether it is related to the specific database I am trying to connect or not by trying to add a database that is already configured as a data source and is working fine, but it turns out that, I am not able to add any database newly - even the ones that are already working fine.

I searched the internet and could not find any helpful links to solve this.  The server is online, the gateway is working fine, I have administrator access to the server, the databases, the on-premise gateway that is running on the server, and the credentials are correct, server IP address, port numbers are correct.  Not able even replicate an already working data source, the reports that are relying on the data sources that are already configured are refreshing automatically without any issue.

Please help