Despite the blank page, you might start by checking “About” to see if your upgrade completed successfully, it’s possible.
Your web server configuration should lead you to the log file. It’s often called php_errors.log or errors.log. It’s an important log to check, don’t skip this. Google for some tips specific to your web server and OS.
Then you will simply have to solve all the FATAL errors you have in your suitecrm.log! You can’t run a system that’s breaking apart like that.
Other than that, I had a quick look at your logs but I’m not going to examine the whole thing, that’s your job . Pay attention to the timestamps: focus on errors occurring at the moment of the upgrade failure.