some general things
– i would think you just updated to php 7.x
– you should never output this things but log them instead see enable debug here https://docs.wp-pizza.com/troubleshooting/
– your first site you are referring to is using an about 2 and a half year old version of wppizza
– i cannot see this warning on your second site

in particular:
although i can quite easily get rid of this warning too (and will do) in the next update
my guess would be there’s something underlying that’s not quite right, like either your php sessions dont work and/or you have no gateway enabled (although by default that should not cause any issues either) or some other things have been disabled perhaps ?! (I cannot tell – as mentioned, i cannot see this issue on your second site to start off with)

I have of course no knowledge of the exact inner workings of googles algorithms (or any other searchengines for that matter)
so I may be off base here, generally though and as far as I am aware they do not index pages that are not linked to from anywhere.
So my first question/guest would be that perhaps you have some sitemap indexing plugin installed that indiscriminately indexes pages of your site and adds them to the sitemap regardless of whether that’s a good thing or not.
Typically sitemap generators should also be able to let you specify which pages/posts/custom post type to index so if you are using this kind of plugin , that’s where I’d look first.

As mentioned though I do not know the inner workings of google et al, so perhaps there is also some other source where and how searchengines find all your pages , even the ones you are not linking to from anywhere on your site, so not withstanfing what I said about sitemap plugins, I would suggest one of the following 2 options

a) (kind of the opposite of what you are asking , but for completeness sake)
*DO* in fact create some single pages that work with your theme as outlined here, ( https://docs.wp-pizza.com/developers/?section=wppizza-markup-single-single-php ) so the single item pages also allow products to be added to the cart (might even be beneficial from an SEO perspective)

b) disable those single item pages by adding the following filter to your functions.php
(a basic filters overview can be found here https://docs.wp-pizza.com/developers/?section=filters-actions-functions)

//option1 : redirecting to homepage 
add_filter('wppizza_filter_cpt_args', 'myprefix_myfunctionname');
function myprefix_myfunctionname($args){
$args['publicly_queryable'] = false;
return $args;
}
//option2 : will result in a 404
add_filter('wppizza_filter_cpt_args', 'myprefix_myfunctionname');
function myprefix_myfunctionname($args){
$args['publicly_queryable'] = false;
$args['query_var'] = false;
return $args;
}

(adjusting myprefix_myfunctionname as per your liking). If using one of these 2 filters, you should also re-save your permalink structure in WordPressAdmin -> Settings -> Permalinks ([your.domain.com]/wp-admin/options-permalink.php) after adding

Hope that helps

good stuff. glad to hear it

are you the administrator of the system ?
what tabs *do* you actually have access to ?
do you have some access rights manager installed ?
when you are saying “since a while” – what did you do when this happened ? (i.e installed some other plugins – notably above mentioned access rights manager – if any )

can you provide a link to the page where you are seeing this please ?

that’s because you are only getting the first half/quarter
the …[‘multi’][1] (why the quotes around the 1 ???, it’s an integer….) is the first half/quarter
so you need to loop through those first of all as in – simplistically speaking – [‘multi’][1], [‘multi’][2] etc etc

the show_ingredients_in_order() or show_ingredients_in_plaintext_templates() functions/methods in the plugin will perhaps help you along

PS: although quite a while away yet, the whole plugin is in process of being re-written / redeveloped to get rid of some of the convolution that has been added over the years by adding ever more and more options, so the above might not be at all applicable anymore when this gets released (will be something like v6.x . plenty of notice will be given and betas will be made available ….)

you cannot hide any selected ingredients as such (i.e if it’s selected, it’s shown)
however, you can add a “No xyz” if a preselected ingredient was de-selected by setting the relevant options in the plugin in the options tab under
“Show de-selected pre-selected ingredients ?”

>but somehow now it does not work.
then you probably have some javascript errors somewhere .
have you checked your browser console ?

without a url i cannot say anything other than the usual:
i.e do you get the same issue when truning off all other plugins and using a default theme ?

regarding cloudflare, can you send me a screenshot of what you are seeing (as i need some info displayed there to help to track things down , thanks)