[GH-ISSUE #590] Crash: The requested security protocol is not supported. #485

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opened 2026-02-26 09:31:37 +03:00 by kerem · 5 comments

kerem commented

2026-02-26 09:31:37 +03:00

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Originally created by @giantmustache on GitHub (Feb 18, 2020).
Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/590

Originally assigned to: @NickeManarin on GitHub.

At the moment I start ScreenToGif I receive an error. Then the program closes down. It seems that something is not supported, although it is unclear to me what to do about it.

I used the single executable, because the installer crashed for the same reason and I hoped that this would work out for me. I have attached the log. Is there any other information you would like to have from me?

► Title -
On dispacher unhandled exception - Unknown
▬ Message -
The requested security protocol is not supported.
○ Type -
System.NotSupportedException
♦ [Version] Date/Hour -
[2.20.3] 02/18/2020 11:06:31
▲ Source -
System
▼ TargetSite -
Void ValidateSecurityProtocol(System.Net.SecurityProtocolType)
♠ StackTrace -
at System.Net.ServicePointManager.ValidateSecurityProtocol(SecurityProtocolType value)
at ScreenToGif.App.Application_Startup(Object sender, StartupEventArgs e)
at System.Windows.Application.OnStartup(StartupEventArgs e)
at System.Windows.Application.<.ctor>b__1_0(Object unused)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Originally created by @giantmustache on GitHub (Feb 18, 2020). Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/590 Originally assigned to: @NickeManarin on GitHub. At the moment I start ScreenToGif I receive an error. Then the program closes down. It seems that something is not supported, although it is unclear to me what to do about it. I used the single executable, because the installer crashed for the same reason and I hoped that this would work out for me. I have attached the log. Is there any other information you would like to have from me? ► Title - On dispacher unhandled exception - Unknown ▬ Message - The requested security protocol is not supported. ○ Type - System.NotSupportedException ♦ [Version] Date/Hour - [2.20.3] 02/18/2020 11:06:31 ▲ Source - System ▼ TargetSite - Void ValidateSecurityProtocol(System.Net.SecurityProtocolType) ♠ StackTrace - at System.Net.ServicePointManager.ValidateSecurityProtocol(SecurityProtocolType value) at ScreenToGif.App.Application_Startup(Object sender, StartupEventArgs e) at System.Windows.Application.OnStartup(StartupEventArgs e) at System.Windows.Application.<.ctor>b__1_0(Object unused) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) ----------------------------------

kerem

2026-02-26 09:31:37 +03:00

closed this issue
added the
🔷 Bug 🐛
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kerem commented

2026-02-26 09:31:37 +03:00

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@Bliamoh commented on GitHub (Feb 18, 2020):

I have the same issue when I'm trying to install the last version (2.20.3) with the installer or with the portable version. I just downloaded the 2.20.2 version and the error didn't appear. Some changes in the 2.20.3 version must cause it.
I'm on Windows 10 x64.

@Bliamoh commented on GitHub (Feb 18, 2020): I have the same issue when I'm trying to install the last version (2.20.3) with the installer or with the portable version. I just downloaded the 2.20.2 version and the error didn't appear. Some changes in the 2.20.3 version must cause it. I'm on Windows 10 x64.

kerem commented

2026-02-26 09:31:37 +03:00

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@giantmustache commented on GitHub (Feb 18, 2020):

I have some more info after I got @Bliamoh 's comment. I got 2.20.3 working as follows:

I received the error when using 2.20.3 portable
I deleted 2.20.3 portable
I installed 2.20.2 portable
I received the notification that I didn't have .NET 4.8 installed. So I installed it.
I restarted my machine. 2.20.2 portable is working fine.
I deleted 2.20.2 portable
I installed 2.20.3 portable. This version is now working fine as well.

So it seems that not having .NET 4.8 installed on your machine lets the application crash and doesn't ask me for downloading it.

@giantmustache commented on GitHub (Feb 18, 2020): I have some more info after I got @Bliamoh 's comment. I got 2.20.3 working as follows: - I received the error when using 2.20.3 portable - I deleted 2.20.3 portable - I installed 2.20.2 portable - I received the notification that I didn't have .NET 4.8 installed. So I installed it. - I restarted my machine. 2.20.2 portable is working fine. - I deleted 2.20.2 portable - I installed 2.20.3 portable. This version is now working fine as well. So it seems that not having .NET 4.8 installed on your machine lets the application crash and doesn't ask me for downloading it.

kerem commented

2026-02-26 09:31:37 +03:00

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@NickeManarin commented on GitHub (Feb 18, 2020):

@giantmustache Yes, it's a know bug. Sorry.

The app is crashing because the .NET Framework 4.8 is not installed before the message is able to appear.
I already fixed it and I'm going to launch a new version next weekend.

@NickeManarin commented on GitHub (Feb 18, 2020): @giantmustache Yes, it's a know bug. Sorry. The app is crashing because the .NET Framework 4.8 is not installed before the message is able to appear. I already fixed it and I'm going to launch a new version next weekend.

kerem commented

2026-02-26 09:31:37 +03:00

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@NickeManarin commented on GitHub (Feb 18, 2020):

I added a warning on screentogif.com and I also pinned this issue.

@NickeManarin commented on GitHub (Feb 18, 2020): I added a warning on screentogif.com and I also pinned this issue.

kerem commented

2026-02-26 09:31:37 +03:00

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@NickeManarin commented on GitHub (Feb 19, 2020):