Image upload error in WordPress 5.3 and next versions

We release the next informative notice due to the bug present in WordPress from version 5.3 onwards and that has not yet been fixed.

WordPress image upload error

WordPress 5.3 introduced a new way of managing uploaded images by detecting large images and generating an “optimized maximum web page size”.

Unfortunately, this feature has a bug that does not allow you to upload images correctly.

When uploading any image to WordPress, the next error will appear (the error shown may vary): Image postprocessing error has probably failed because the server is busy or does not have enough resources. It may help to upload a smaller image. The suggested maximum size is 2500 pixels.

Until a WordPress update is released with a fix for the error, there are two ways to fix the problem and they are listed below.

Solution to image upload error

Option 1: Add a function to your theme, functions.php file:

add_filter( 'big_image_size_threshold', '__return_false' );

Option 2: Use a free plugin: https://wordpress.org/plugins/disable-big-image-threshold/

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