For example: if I set 4 as maxItems on a Stack field, I get the message:

Quote

You must provide less than 4 items

which is not right. It should be "You must provide up to 4 items" or something like that.

Language bit: form_items_max.

Thank you for bringing this issue to our attention! I can confirm this should be further reviewed and I have logged an internal bug report for our development team to investigate and address as necessary, in a future maintenance release.