1)Restart VS Code (sometimes it will solve your issue)

2)Update VS Code:-Go to "Help" -> "Check for Updates" ( check for updates, if you can do the update in your vs code it may also solve your issue which you mention above)

3)Uninstalling and Reinstalling Specific Extensions which is needed (this is an common idea which you can try to uninstall unwanted extensions and after restart the vs code, then try to reinstall your specific extension which you need)

4)Uninstall your current version of vs code and Reinstall the newer version of vs code. (This is not a best idea for all time, if you don't have any other choice you can try it. )