Thank you for your post and for these additional details and please sorry for the delay in my response.
Currently, the IDE supports TLS 1.2 and this data was implemented additionally to .NET settings.
However, at the same time, a reason for the issue could be that TFS server which hosts your Git repositories doesn't support TLS 1.2 and this is why the connection to your repository was failed.
We will investigate this case, and a possible solution for this would be to change the TLS connection to SSL inside the IDE.
Also, you can try the next solution - this can be a possible fix for this case:
- please open C:\Program Files (x86)\The Welkin Suite\The Welkin Suite and find 'TheWelkinSuite.exe.config' file;
- under the following hierarchy:
please add the next:
- please save the file, open the IDE, and please check if the issue would be reproduced.
Looking forward to your response and hope that this would help, however, our developer will continue to investigate this case.