Unity 2019.4 Visual Studio not opening!

Hey everyone,
I’m using Unity 2019.4.15f1 (LTS) and Visual Studio 2017. Visual studio was working fine, however recently I tried upgrading my project to 2020.3.24f1 (LTS).

Then I decided to continue my project in Unity 2019 to avoid any surprises. Since then I cannot open Visual Studio for some reason…

Once I open Visual Studio I get a popup with this message: “A fatal error has occurred”
“Details of this error have been automatically sent to Microsoft for analysis. Visual Studio will now close”.

Obviously this is frustrating, I can’t really work on the project anymore… Does anyone know why this might be happening and how to fix it?

Thanks

Might be that you have too little computer RAM, or you need to go to edit - preferences - External tools and clcik on external script editor and change it to Visual studio. You can also move on to Visual studio 2022 and it works fine.

I highly recommend Visual Studio Code. It is much more light weight than the regular Visual Studio. VS has a lot going on that you probably don’t need.