Can't add new calendar

[doktoil-makresh]

Hi,

I'm using Larry or Classic skin with Rouncube version 1.4.13 and calendar plugin version 3.2.8.
My caldav agendas are syncing well.

However, I'm not able to create new calendars. Nothing happens.
No error log in roundcube, no HTTP traffic when clicking this button

What could I do to debug this?

[chittaranjan870]

Dear,
I am unable to view calendar button active in roundcube dashboard.
I have roundcube-1.4.9
and plugin