It's me again.
I tried all ways to replicate what Shane sent me, and basically, the Database I received does not hold all the native mandatory WordPress tables, it has different prefixes, and throws errors on import.
It cannot be that your minimal WordPress install has a Database like this. No WordPress install can work with it.
See screenshot.
I allowed myself to install a Plugin on the site you provided (hidden link) and grabbed a copy, as there the database is intact.
I uninstalled the plugin again to leave no trace.
Your database still features at least 2 prefixes.
wpv3_ and wp_
Most are in the wpv3_ so I used that one.
wp_ prefix doesnt work.
However, if I disable all plugins but Toolset, WooCommerce and the WooCommerce Views, and make sure the setting in WooCommerce Views is correct (actually, it does not matter which) and load the URL hidden link I see a row of errors, related all to the themes/bootstrap-basic-child/functions.php.
Deprecated: Function create_function() is deprecated
Call to undefined function masterslider()
Call to undefined function masterslider()
So the situation is, that while Shane was able to see the issue on your live site, and I probably will see the same when I update the plugins on your live site, locally your site presents issues that make it impossible to debug.
What is also pointing to an exception is that no other user reports this issue, nor do we see it when we create our Reference Sites.
What we need to help you is a copy of a site that is built with Toolset and WooCommerce which uses native WordPress Databases, has no fatal errors in the custom codes of the Theme and uses a supported Theme.
The Theme you use is based on a public Theme, but we do not support Child Themes - with this I mean, we do not debug or add compatibility to child themes.
However, I see that you report this same issue for many sites and I understand that this points to a replicable issue.
But, no one of us can say how to replicate it.
All I know is that updating 2 plugins on a site that has an altered database, PHP fatal errors and several other plugins active, fails with a wrong output on the front end.
This site is not replicable properly locally due to the database issues.
If you have hardened your Database we need to know this.
Now, to help you in the best way possible I would like to involve the DEV in this straight away.
But, as well he won't be able to guess what happens. He needs to see it, and locally.
What I need is a Copy of a Database and a ZIP of a WordPress install where the issue is NOT yet visible.
Hence, like your site you provided here recently.
Where the issue is not yet visible because the plugins are not updated.
I need to be easily able to replicate this site.
Then, I need a link to the page where the issue should be visible and there should not be any errors related to other code.
I think we can use hidden link but we need to solve those errors there first.
Or, if you can outline me the steps you take to make this issue happen, then I can try to replicate it, but as previously was shown, it's not replicable if the steps are followed.
Let's not lose time in discussing what we see and get a copy for the developers ready.
Do you have a copy of a site which is not customized in this way?
I apologise that I need this, but even a experienced Developer will not be able to dig this issue without something to put his hands on.