in any event

>quote from your service provider:
>I will kindly ask you to contact the plugin support team and ask them how exactly shall we override this error.

they cannot possibly be serious. it’s THEIR session setup error. there’s nothing to “override” . it’s the server/hosts job to setup session handling correctly (unless of course the user – i.e you – has access to the php.ini and messed it up 🙂 )

let me put it this way. the plugin (wppizza that is) doesn’t care one iota what kind of session handling the server uses. files, memcache,memcached or whatever else they/you want to use
all it cares about is that sessions work. if they do not , then the setup is simply wrong . there’s 100% nothing the plugin (author) can do about it or “suggest” other than “fix your server setup. I know nothing about it”

i can give you a hint though: if using memcache, the session.save_path should most certainly not be /tmp (which is what it looks like looking at your configuration you sent)

PS: there is always an – outside – chance though that some other plugin messes around with these things , but suffice to say, it isn’t wppizza, i can assure you

>Is there another log file I can check?
no (and even if there was , it would tell you the same thing)

if you do not have access to the php.ini then whoever administers your site/server needs to fix this
that error “PHP Warning: session_start(): Cannot find save handler ‘memcache’ – session startup failed…” should be more than enough to know where to look (i.e the php sessions setup)
the most basic google search for that error will also show various approaches to fix this . which on would be the appropriate one , however, only the server/site admin will know

furthermore, php.ini’s might also be configurable for each site, so even if one site on the same host works, does not mean another one must do if the configurations differ.

again, if you do not have access to the php.ini (as you say you don’t) there is zero you can do (or I for that matter) and it is for the admin to fix.

that said (again, i think this is only a very very very VERY – you get the idea – remote possibility), you could try to de-activate all other plugins.
if for some mysterious reason this suddenly works you ‘ll have to find the culprit by re-activating your plugins one by one
if you find that de-activating all other plugins does not make any difference, the previously said applies

>but when I add an item to the menu in the original site it adds it to the new site menu.
are you using a multisite setup or 2 distinctly different domains and installations