Unable to attach Qlik Sense file to a discussion

[micheledenardi]

I'm tring to attach a QlikSense file (.qvf) to a discusson under Qlik Community>Qlik Product Boards>Qlik Sense>Qlik Sense Enterprise>Qlik Sense Enterprise Discussions>Qlik Sense App >Development> New Question  Section

So i wrote my question and then i've attached the file to the discussion:But when i push "Post" button the system returns the following errors:

What i'm doing wrong ? How can i attach a qvf file ?