TypeError: Zentyal.escapeHTTPQuery is not a function

[rickyx]

After installation of Zentyal development edition 4.1 I try to install some package:
select some components and click on install.
Wait a second for the confirmation box and click continue.

Nothing. Click again. Nothing.
Open che browser console ( F12 ) i see the error:
TypeError: Zentyal.escapeHTTPQuery is not a function

The same error in the system update ( function doUpdates(title) ).

Thank you,
Rickyx

[rickyx]

After some restart and some manual update-upgrade the problem disappeared.

In any case there is some issue with the availability of this function:
escapeHTTPQuery is now present in the window.Zentyal object.

Nice day,
Rickyx