Fix “Post processing of the image failed” – WordPress Error (All Solutions)

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Video guide

Debugging the issue

There is a file at /var/log/apache2 which logs all the errors that happen on your websites.

tail -f /etc/apache2/error.log

This will list your errors on your apache websites real-time.

See the video above to know how I debugged and solved this error.

All Solutions

1. Install php-mbstring module

SSH into your server and type:

sudo apt-get install php-mbstring
sudo service apache2 reload
sudo service apache2 restart

This will install the module for you and most probably will solve this issue for you.

Remember: On the video above you might have seen that doing this didn’t work right away for me. But only after continuos restart and reload of apache server. Or you might need to just reboot your server with:

sudo reboot

Update your php.ini

First find your install php version:

php -v

Now that you know your php version, cd into your php version at:

cd /etc/php/(php_version)

Now, edit you php.ini

sudo apt install nano # If nano not installed on your server
nano /etc/php/(php_version)/apache2/php.ini

Since you are using nano use your CTRL + W keys to find text.

Change these to:

post_max_size = 128M
upload_max_filesize = 128M
max_execution_time = 360

Will add more fixes… comment one below !

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