Magento – White screen after updating Magento

If I take a look at the line 104 your error logs are complaining about, I see the following

#File: app/code/core/Mage/Adminhtml/Controller/Action.php
protected function _setActiveMenu($menuPath)
{
    $this->getLayout()->getBlock('menu')->setActive($menuPath);
    return $this;
}

It looks like Magento's trying to grab a reference to the menu block, but it can't became some customization to your system has removed this menu, and then tried to call setActive on a non-object.

$layout = $this->getLayout();
$block  = $layout->getBlock('menu');
$block->setActive($menuPath);

So, your first question should be what removed this menu. Possibilities include

• A custom module
• Someone's hacked some core code
• Your admin layout XML files are somehow inaccesible to Magento, and the menu was never added

Based on the rest of your question, and the other errors you're seeing (a missing mage_banners table), it sounds like your best bet may be finding a Magento professional to help get your site repaired. It seems like these issues may be the only the tip of the iceberg.

This took a minute to figure out. I had to use a tool called beyond compare to fix it.

I did the upgrade using the "magento connect" via the admin. However this caused several issues. I upgraded 1.7.0.2 to 1.9.2.2

To fix this, you need to download the 1.9.2.2 CE from the magento site, then compare your directory structure to the files you just downloaded. You'll notice that many rogue directories have been created as file names (example: filename.php is actually a directory) You need to delete the directories and then copy the correct "file" over. You'll also notice that several hundred other files did not copy over. You'll need to copy those over too.

Long story short, don't use the magento connect upgrade, do it manually from the download.