EDIT by Ruri: I cleaned up this guide since it’s the first thing that shows up when someone searched “OpenBullet 2 installation” on Google.
OFFICIAL INSTALLATION GUIDE
Web Client + Windows guide
Download OpenBullet2.zip
from this page
Download and install: Download ASP.NET Core 6.0 Runtime (v6.0.1) - Windows x64 Installer
Unzip and launch OpenBullet2.exe
If it crashes, start cmd, drag the .exe into it and it will give you another Microsoft download link, just install that one too
once launched, you will see a a window with red text now open any browser and go to http://localhost:5000/ and you should be able to see the interface
Help each other out if you guys face issues.