wordpress upgrade from 4.2.1 to 4.7.3 500 error

Question

For some reason, WordPress wont let me automatically upgrade, so i am going down the manual root.

I have uploaded the contents of wp-admin and wp-includes, backing up the previous folders.

When trying to navigate to the frontend, or even admin i just get a 500 error.

I have disabled all plugins, and even reverted to the default twentyfifteen theme by updating the database options "stylesheet" and "template".

Doing this still produces the 500 error. If i revert the files back to before the upgrade, everything works fine.

Any ideas what the issue could be?

You can check the errors.log to find out more about cause of error 500. It is in general that you might have some directories permission issue or some php parsing error. — hcheung, Commented Mar 16, 2017 at 13:02

majick · Accepted Answer · 2017-03-16 11:58:05Z

1

It is hard to track down the cause of a 500 error, so here's what I'd try:

Be sure to also copy the new root folder files (except wp-config.php) - not just the wp-admin and wp-includes directories.
Go the other way around. Make a backup copy of the current wp-content directory and your wp-config.php file. Do a complete fresh install of the WordPress files from the latest zip and then copy the wp-config.php to the install root and copy the wp-content folder over the new one.

answered Mar 16, 2017 at 11:58

majick

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