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Could not create SSL/TLS secure channel. #391

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@MatthK

Description

First of all, thank you very much for this awesome product. I just found it, and it is really cool. Unfortunately I came across a little problem.

Describe the bug
I am trying to install the Resident Agent on an old Windows 7 machine (yes I know, it's outdated). I can connect using the instant support client (but then I have to acknowledge the connection). When I try to install the agent, I get the following error message:

2021-11-12 14:26:33.698	[Error]	The request was aborted: Could not create SSL/TLS secure channel.	   at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.WebClient.GetWebResponse(WebRequest request, IAsyncResult result)
   at System.Net.WebClient.DownloadBitsResponseCallback(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Remotely.Agent.Installer.Win.Services.InstallerService.<DownloadRemotelyAgent>d__22.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Remotely.Agent.Installer.Win.Services.InstallerService.<Install>d__13.MoveNext()	System

The server runs on Docker, and there is an nginx reverse proxy in front with a Let's Encrypt SSL cert. I was thinking that the Window 7 machine doesn't have the new root cert, so I added manually to the trusted root certs on the client. I also installed .net 4.8 runtime (just in case), but the problem persists. I can login to the website, the connection is shown as secure, but the agent won't install.

Remotely Version
Server (can be found on about page): Version: 2021.08.17.1435
Agent (can be found in device card): Can't install

Expected Behavior
Be able to install the agent

Desktop (please complete the following information):

  • OS: [e.g. iOS] Window 7 Home, Service Pack 1

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