fatal-error

Add below code in wp-config.php file. define(‘WP_MEMORY_LIMIT’, ‘256M’); For more details check “Increasing memory allocated to PHP” here https://codex.wordpress.org/Editing_wp-config.php

Most likely some files are missing or corrupted. This can happen on new installs. The solution is to download the latest version of WordPress then access your site using FTP and delete directories “wp-includes” and “wp-admin” and then upload fresh copies of directories “wp-includes” and “wp-admin”. https://wordpress.org/download/

That’s for sure an update plugin error, the best thing you can do is to report to the plugin developers, they may have been aware by now but talk to them to see what happens. When a client comes with a similar problem, I suggest to: Update PHP, probably you are using 5.5. Downgrade the … Read more

I think is an problem of php code, maybe in your functions.phg of the theme. Start debugging feature in WP and see the error messages. add this to wp-config.php or change the constant in the file. define( ‘WP_DEBUG’, TRUE ); Also i think, read this question and his answers, many solutions for the problem.

Seems like you’re running an outdated PHP version (lower than 5.3)? You should update the PHP on your server. Best case to PHP 7+

I’m editing public/wp-includes/functions.php file, not the core one. It used to work. Ths is your problem, never modify files in the wp-includes folder under any circumstances!. When tutorials and articles refer to functions.php, they’re referring to the functions file in the current theme. This file does not always exist but you can create it. I … Read more

Its since wordpress 3.0 http://codex.wordpress.org/Function_Reference/term_exists#Change_Log

Object of class WP_Post could not be converted to string

WSOD on 4.1.1 after migrating from Bluehost to Dreamhost