Problem:
The user was encountering Fatal errors after updating Toolset plugins.

Solution:
It appears that Toolset types is not compatible with Siteground's Ultrafast PHP option.
When I turned this off and used Standard PHP, the site has performed normally.

Problem:

I have an odd thing happening with one of my views that should get posts that are published between two publish dates. The dates are set by a shortcode attribute and a custom date field set by the current page (post). It works fine for any set of dates EXCEPT if the date range crosses over from one month to the next month.

Solution:

It is a limitation of WP_Query, when the report-start "day" value is larger than the report-end "day" value, it will conduct the problem you mentioned above.

In your case, I suggest you setup the View filter with wpv_filter_query filter hook, for example:

https://toolset.com/forums/topic/filter-view-between-post-dates-compared-with-shortcode-attributes/#post-2108303

Relevant Documentation:

https://toolset.com/documentation/programmer-reference/views-filters/#wpv_filter_query

https://developer.wordpress.org/reference/classes/wp_query/#date-parameters

Problem:

Can I network register a single Toolset license for this use across all subfolder sites or do I need a separate license for each ?

Solution:

You can network register one single license across all subfolder sites, see our document:

https://toolset.com/faq/how-to-install-and-register-toolset/#registering-toolset-on-a-multisite

On a WordPress Multisite, when you activate Toolset network-wide you can also register it for the whole network.

Relevant Documentation: