Error 500 typically means there is some sort of coding error being encountered.
It could be a syntax error due to mismatched file versions or incomplete upload of files.
It could be a result of restricted content as defined by your server administrator.
Usually the cause is documented in the server's errorlog.
Blank pages are almost always a result of PHP syntax errors ... which could be mistakes in coding or customizations to files, or incomplete uploads of files. Sometimes the errorlog will tell you more about it.



