Sources Dock not working

[Cobra2x2]

Hi everyone,

I’m having a major issue with OBS Studio and could really use some help.

• I originally had StreamElements SE.Live installed, but it was causing constant errors (400 authentication errors, failed tokens, etc.).
• I uninstalled SE.Live, removed leftover plugin folders, and even reset OBS (renamed the %appdata%\obs-studio folder).
• Now OBS opens, but the Sources panel is broken: when I click the + button, nothing happens at all — no menu pops up to add sources like Display Capture or Video Capture Device.
• I also get errors when trying to connect Twitch: “fail to authenticate Twitch account” and sometimes “cannot access channel or stream key.”
• I’ve tried:
  • Resetting the UI (View → Docks → Reset UI)
  • Creating a new profile in OBS
  • Running OBS as administrator
  • Reinstalling OBS Studio (latest version from obsproject.com)
  • Clearing out plugin folders

None of these fixed the issue.

My setup:

• Windows 11 64-bit
• Latest OBS Studio (freshly downloaded)

Right now, I can’t add a camera, display, or any sources at all — and Twitch won’t authenticate properly.

Any advice on how to fix the Sources panel not responding and clear the Twitch authentication errors would be greatly appreciated.

Thanks in advance!