How to submit case to the bug?

Hello,

I'm a new user of Snap! Empower. It happened that I found a bug. I would like to submit it using online form, but it is not possible, because field Case category is required, but empty. No type of case cannot be reported.

http://www.lectora.com/uk/support/contact-support-form/trivantis-elearning

Is there any email where I could report a bug to a online form listed above? Or how could I report a bug to Snap! Empower?

Best regards,

Michal