How To: Solve Safari Cannot Open Page. The server has unexpectedly dropped the connection

Solution: You need to remove the cached website data. After doing this, and restarting Safari, everything should work again.

Open the Safari Preferences, and select the Privacy tab, then click 'Remove All Website Data...'


You will be asked to confirm this, click 'Remove Now' to proceed.


This procedure will remove cookies and cached content for websites, which means you will get logged out of any sites you were logged into already.