Exporting to WAV - no sound!!!

Please help! I am new to DAW and Cubase, so please forgive me if I am doing something wrong.

Recorded 4 MIDI tracks and trying to export to WAV. No success!!! WAV file is empty! When added to the project it briefly says something but it so quick I cant see it… Track is empty as well.

Please help to export to WAV!

Thank you!