If you have alerts appear on screen but never go away than it is usually because of your security software attempting to deny CLR Browser on OBS.
This guide will show how to allow it with Kaspersky (Since it does this most common) but it could also apply to other anti virus software.
- Open settings in Kaspersky and find "Threats and Exclusions "
2. Next add the following file locations to Exclusions
C:\Program Files (x86)\OBS\OBS.exe
C:\Program Files (x86)\OBS\plugins\CLRHostPlugin\CLRBrowserSourcePlugin\CLRBrowserSourceClient.exe
C:\Program Files (x86)\OBS\plugins\GraphicsCapture\injectHelper.exe and injectHelper64.exe
C:\Program Files (x86)\OBS\QSVHelper.exe
3. Next you will need to save the settings added and restart your PC. After restarted it should be working normally again.