It should prompt you with a window asking you to provide additional information to the developers.

Please try to launch Streamlabs Desktop.

Find the slobs-client folder and create a new folder named 'CrashMemoryDump'.Copy: %appdata% then press the Windows Key on your keyboard, Press CTRL + V, then press Enter.> Please note that this process can take several minutes If you can't open Streamlabs Desktop: Paste the file name into your chat with support.When the progress bar has filled, and it indicates `Successfully uploaded the additional debug information, please highlight the filename and copy it (either right-click > copy or CTRL+C).Once you see additional debug information saved successfully, click 'Yes' again.You should see a prompt asking, 'Share additional information to the developers?' click 'Yes.'.> Note: Streamlabs Desktop needs to crash again to proceed to the next step Tick the box for 'Enable reporting additional information on a crash' (requires restart).When you experience a crash, you should immediately enable additional reporting information to allow the development team more information to investigate your crashing issue.

Enable Reporting Additional Information in Streamlabs Desktop

Streamlabs lagging