When the virtual link is under SVN version control, sometimes the link cannot be connected inexplicably, and the link is disconnected. This is because the execution path of the UE's path to find the SVN path sometimes becomes a relative path inexplicably, and then cannot be found. So you need to configure it yourself.
First set the link SVN address in the editor, and then in the project Saved\Config\WindowsEditor\SourceControlSettings.ini
This directory will generate this ini
Open this ini and modify it
[SubversionSourceControl.SubversionSourceControlSettings]
inside
ExecutableLocation="D:/Epic/UE_5.2/Engine/Binaries/ThirdParty/svn/Win64/svn.exe"
This address is the actual path of the svn executable file on your computer, so there is no problem.