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Error: The request was aborted - Could not create SSL/TLS secure channel

I am working on a C# app that pulls in data from Jira of all the issues. The authentication seems to be working, however when I try to get the data, it throws the SSL/TLS error. SDK is updated to the latest version, same code was working yesterday but not today. 

Line of Code giving error: List<atlassian.Issue> results = (from i in this.JiraConnection.Issues.Queryable......



The change is probably a result of the change Atlassian implemented on 8th July to remove support for TLS v1.0 and v1.2. See

You will will to change the security level. As an example see

Does anyone have any ideas on why JIRA is denied (The request was aborted: Could not create SSL/TLS secure channel.) a simple and industry standard request?

RestClient client = new RestClient();
RestRequest request = new RestRequest(Method.GET);
IRestResponse response = null;

client.BaseUrl = new Uri("https://**");
client.Authenticator = new HttpBasicAuthenticator("**", "**");
request.Resource = "rest/api/2";
request.AddHeader("Accept", "application/json");
request.AddHeader("Content-Type", "application/json; charset=utf-8");
request.RequestFormat = DataFormat.Json;
response = client.Execute(request);

if (response.StatusCode == HttpStatusCode.OK)
// Success.
string text = response.ErrorMessage;
// text = The request was aborted: Could not create SSL/TLS secure channel.


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