I am having the same issue “RED HTTP ERROR” I even tried to FTP the images into the uploads folder and they will not show up in the library. Has anyone figured this out yet? I have a bunch of other wordpress installs and there is no errors but this one blog is producing it.
i have already read an article like that, but i was wondering how do i Drop these global tables in the database:
wp_blogs
wp_blog_versions
wp_registration_log
wp_signups
wp_site
wp_sitemeta
i removed the code just before happy blogging in wp-config, changed allow multisite from true to false. this iw when i was getting a DB error. Then WP suggested i add a code to config to fix the db and i did then a report produced those errors above.