Hi there – first thing to do is not panic. Your site is producing a 500 error, which is very different from saying that the site has been reomved completely. The likelihood is that your site and content is o.k, but that you have a configuration problem that needs to be resolved.
Here are some things you can try, after making a full backup of all your files and the site database:
* delete your .htaccess file (in the root folder of your WP installation). This file handles all the WordPress redirects, and may have been corrupted in your updating. When you’ve deleted it, try to browse to the site and see if the problem is fixed (WordPress will generate a new .htaccess automatically).
* Your problem may have been caused by an incomplete update of WordPress. Try to do a manual update following these instructuions: https://codex.www.ads-software.com/Updating_WordPress#Manual_Update
Then try and load your site
*Try deactiving your plugins to see if they’re causing the problem. To do this, go to the plugins folder via ftp and rename it plugins_edit This will deactivate the plugins. Try to load the site then. If the site loads, you’ll know that the problem is with one or more of your plugins. You can then rename the plugins folder back to plugins, and again via ftp disable individual plugins by renaming their folders.Through trial and error you should be able to find the plugin causing the problem. Make sure you update all plugins and check for compatibility with WP 4.7
Hope this helps.
