The ‘HTTP error’ you’re encountering when trying to upload images to the gallery could be related to a few different factors. While it depends on the exact error code, a common cause of this issue is related to server permission settings. It’s possible that there are incorrect access permissions for the specific server folder where the images are being uploaded.
I recommend checking the folder permissions to ensure they are set correctly. Additionally, you might want to review your server’s error logs for more detailed information on what’s causing the issue. If everything appears to be in order on your server, it could also be helpful to temporarily disable other plugins to see if there’s a conflict that might be causing the error.