Thank you for the screenshot.
The sidebar is reloaded because RosarioSIS could not determine your click (here opening the "Calendars" program) was an AJAX call.
A page request is an AJAX / XHR call if and only if the
X-Requested-With header is set to
I believe you are using Chrome browser, right?
You can check the HTTP headers while browsing RosarioSIS and check the
X-Requested-With header is present:
Here using Firefox, you can see the header is present in the request for the
Do you have the same problem on the demo site?
In case not, you should try to reinstall RosarioSIS on a clean basis.