Re: BF4 Bug/Error "Leaving level"

But sometimes you need to reinstall Punkbuster. It's a common cause of problems.

Reinstall Punkbuster.
Go to C:\Program Files (x86)\Origin Games\Battlefield 4 and select pbsv.exe . Choose 'reinstall' (while connected to the internet).

- Or Make sure that you've installed latest version of Punkbuster.
http://www.evenbalance.com/index.php?page=pbsetup.php

Install advice for Punkbuster https://help.ea.com/uk/article/punkbuster-technical-issues
Link provided courtesy of Libever http://answers.ea.com/t5/Battlefield-4/Hello-I-got-kicked-out-of-every-server-I-joined-today/m-p/1909109#U1909109

Also

- Make sure you download and install the latest Battlelog plugins.
First uninstall old Battlelog plugin by going to "Control Panel\Programs\Programs and Features" and removing "battlelog web plugin".
Then log in using Origin and go to battlelog page where you'll be prompted to download latest web plugin.
After you have installed it you should clear your cache, exit your browser. Then restart your browser, and then re-login to Origin to ensure proper install.
If this doesn't work then you should try a different browser (Chrome/Maxthon/Firefox, etc)

And 

-Disable Origin in game.
In Origin - Application settings - Origin in Game - disable Origin in game