Solved: OMP: upgrade to 3.1.1-1: manageCatalog : metadata not loaded

This is a cache problem: empty cache, remove cookies, reload the page and everything works fine.

after the upgrade, in the Admin area > manageCatalog > Monograph > Entry panel.
Metadata are no more loaded:

The js debugger says:

Uncaught TypeError: $.pkp.classes.Handler.hasHandler is not a function
    at HTMLDivElement.<anonymous> (build.js:6)
    at Function.each (jquery.js:384)
    at jQuery.fn.init.each (jquery.js:137)
    at Object.init (build.js:6)
    at eval (eval at <anonymous> (jquery.js:339), <anonymous>:2:19)
    at eval (<anonymous>)
    at jquery.js:339
    at Function.globalEval (jquery.js:340)
    at jQuery.fn.init.domManip (jquery.js:5931)
    at jQuery.fn.init.append (jquery.js:5704)