I looked into the subject “wp-content/uploads/2022/10” folder, and the right permission was set to 755. Temporarily modifed to 777, and retried but same result.
Subject file size is only 140KB
Here is the condition set for the subject attachment attribute.
Hi,
This is a WordPress-level error (returned by the core wp_handle_upload function). Please make sure that all the file permissions and other settings are correct (you can also try disabling plugins, maybe some plugins interfere in the upload process). I found these related topics: