Facing 'Input Control Validation' error when trying access to a report (that contains NULL values in its Input Control) through Visualize.js

Problem: 

When trying to access a report that contains input control with a NULL value with data type integer when being fetched through Visulaize.js. 

Solution:

If the report has a java.sql.Timestamp parameter; Since JasperReports Server v.7.2.0, Timestamp parameter value must be specified in format timestamp_1: ["2019-09-11T20:05:26"] while previously both formats were allowed timestamp_1: ["2019-09-11T20:05:26"] timestamp_1: ["2019-09-11 20:05:26"]

As stated in the Visualize.js guide, in case an empty integer value should be passed as a parameter value, it should be specified as "~NULL~".

Also, there are other special values: "" – An empty string, a valid value for text input, and some selectors. "~NOTHING~" – Indicates the lack of a selection.

In multi-select parameters, this is equivalent to indicating that nothing is deselected, thus all are selected.

In a single-select non-mandatory parameter, this corresponds to no selection (displayed as ---).

In a single-select mandatory parameter, the lack of selection makes it revert to its default value.