Problem fixed!
You should have a simple edit on wp-admin/includes/file.php
Replace line 149
if ( empty( $filename ) || ‘.’ == $filename ) {
with
if ( empty( $filename ) || ‘.’ == $filename || ‘/’ === $filename ) {
Tested and working !
4.2.1 plugin updates not working.
themes updates not working in bulk mode, working only one by one.
getting “Connection reset” error.
what security update is this, when we have no way of updating plugins anymore ???