digitalbox

something is wrong with the upload_path in wp_options table. I suppose that has the following : /home/gleeful/public_html/blog/wp-content/uploads

try to change it manually via phpmyadmin to blog/wp-content/uploads (remove the path to /home/USERNAME/public_html)

it seems that the plugin has a size upload limit. Try to upload a small file (for example 50KB) and check if you getting the same error.

Also, check the plugin options for any setting about max upload file size and change it.

try to change all folders and subfolders to 755 and all files to 644.

also, do you know what PHP handler run on your box? (DSO, suPHP, Fcgi)

via https://www.rosehilltravel.kr/wordpress/wp-admin seems to working

unfortunately, you can’t restore from cpanel. You can send your backup to your hosting provider (via wetransfer.com, yousendit or any other similar service) and they can restore it for you.

it is clear that it concerns a RAM issue. Is this error from your VPS or shared hosting?