Publishing Error. Signature file does not exist.

Publishing Error. Signature file does not exist.

  
I am getting this error on some of the e-spaces that I am trying to publish. 

Publishing Error
 
Signature file C:\Program Files\OutSystems\Platform Server\share\**\full\Signature.fi does not exist.

What could be causing it ? 
Hi kota,

Did you report this to OutSystems support?
Not yet.
Well, in that case I would suggest you to contact them immediately. And in general, contact them right away when you get strange publishing errors.