UI Layout Initialization Error PrimeFaces 6.2

Question

The following code works fine with PrimeFaces 6.0 and 6.1, but with 6.2 when I click on button Validate I see the

Answer 1

There is a bug in PrimeFaces 6.2 that cause this issue.
The bug is reported and is resolved in PrimeFaces 6.2.1

More info can be found here: https://github.com/primefaces/primefaces/issues/3457

As melloware mention in the link above, adding the following code in web.xml solves this issue.

<context-param>
    <param-name>primefaces.MOVE_SCRIPTS_TO_BOTTOM</param-name>
    <param-value>true</param-value>
</context-param>