I've been running multisite for about 9 months now.
I've got around a hundred sites including some large ones.
Now, when I try to add new sites, it says "site added", but when I go to the All sites page and click Edit for the new site and check the settings page its almost empty: just one entry for upload space
Site Upload Space Quota MB (Leave blank for network default)
WHen I try to click on dashboard it redirects to the main site wp-admin
When I click on visit site it redirects to http://site.com/wp-admin/network/sites.php or sometimes goes to a white screen
What causing this bad behavior?