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Posted a reply to Post-processing of the image failed., on the site WordPress.org Forums:
Check if you have the php-mbstring module installed ? I finally had to solve it… -
Posted a reply to Error with image uploading, on the site WordPress.org Forums:
Do you have the php-mbstring php module installed ? Try this post : https://www.techify.club/2020/11/fix-post-processing-of-the-image-failed-wordpress-error-all-solutions/