There is a known misconfiguration concerning auto-update functions.
The issue appears mostly on OVH hosting.
The automatic updates might not work for plugins you purchased via our site. This it's a general server / hosting issue we have no control over.
The problem is that for reasons to be cleared with your hosting it seems that the database / server might not be fully compatible with today's standards - 32 instead of 64bit versions.
This could in turn give problems with other plugins as well so best thing is to contact your host about this or follow the above instructions.