Someone should really update the documentation to indicate in which version new features were added. Not everyone is running the very latest version.
My company is using UI for ASP.Net MVC version 2019.3. (2020.2 is currenlty being evaluated)
Is my assumption correct that "validationSummary: true" in validator was NOT added until version 2020 R2?
I spent hours trying to figure out why this was not working with 2019.3? :)