blazgt on "HTTP Error. when uploading images"

Put this is your themes function.php
first solution1:

add_filter( 'wp_image_editors', 'change_graphic_lib' );

function change_graphic_lib($array) {
retu array( 'WP_Image_Editor_GD', 'WP_Image_Editor_Imagick' );
}
============ OR ========
Second Solution
or may be issues with:
The issue was related to my server configuration not having the proper amount of memory allocated to Apache/PHP.

If anyone has this same problem, please try verifying that you have enough (64MB+) server memory allocated to Apache/PHP in your server configuration settings.
You can also add this to your wp-config.php file:
define('WP_MEMORY_LIMIT', '64MB');

Third solution:
Connect to your website using the FTP client and then go to /wp-content/ directory. There you will see /uploads/ folder. Right click on the uploads directory and give file permission 755.

let me know if among three of not working