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Hi Malcolm, as stated in my original post, UPLOADS was defined in the config file and everything was working fine until I clicked the update button.

I had no choice but to move all the images to the wp-content/uploads/ directory and then use SQL to go back and change all the links that were coded inside pages/posts to point to wp-content/uploads/ instead of the media directory we had been using.

Having the same problem with WordPress 5.3.2. Nothing would save or publish due to the “The response is not a valid JSON response” error. Not only that but in publishing a post there was no access to the slug or post categories fields.

Installing the classic editor plugin solved all issues (as well as restoring access to the slug field and categories fields).

So the question is when will WordPress issue a fix for what seems clearly to be a system bug?

Hi @judgerookie,

You nailed it. That is exactly what was happening.

Thank you so much for setting me on the right track.

Jim

Highly annoying that jpeg image compression is a total fail.

The compression I am referring to is the compression of the images that are automatically created as a part of the add new media functionality. If you look in media settings you will see that you can set sizes of images to be automatically created when you upload a new image. This image generation appears to be handled by plupload. Apparently changing the jpeg_quality value has absolutely no impact on plupload.

What I’d really like to know is who thought that it would be a good idea to create thumbnails at 100% quality?

Hi Mike,
Compression setting before seems to have been 90. That is what was indicated on the slider. Even though I had previously edited functions.php to change quality from 90 to 70 – which had no impact at all – nor did other changes. Hence my decision to try a plugin.

The images I’m working with are jpegs – I had no expectation re png compression.

Both GD and imagick libs are available to me.

Hi JenR,

I did look. What is really annoying is that people would have to install a plugin to change something as simple as a default value for a variable.

I have no problem with modifying the core files, especially since the only change being made is to a variable constant – changing it from 90 to 70. Apparently WordPress ignores these values as changing them has made absolutely no difference!!!

I even searched through the mySQL database thinking that perhaps the variable was being set there but found nothing.

Digging further, I found another reference setting quality as follows:

File: wp-includes\class-wp-image-editor.php
Code: protected $default_quality = 90;

I changed this one to 70 as well. Made absolutely no difference.

So what’s the point of an image quality variable if it’s value is ignored?