[e-users] transparent calendar

[Foxy]

For some weird reason the calendar module is empty and completely 
transparent. I had an old version before and it displayed the calendar. 
But now I have an empty transparent rectangle instead (see the image 
attached).  I tried to remove ~/.e/e/modules/calendar and install the 
module again but it still not visible...

Has anyone any idea what is wrong?
Funny enough I was trying to make transparent the background of engage, 
but did not manage it...
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