Hey there,

It looks like your account isn't tied up with any subscriptions on our site. Is there any mistake on our end? Would it be possible for you to contact us at https://crm.stackideas.com and provide us with the order reference and your username so that we can fix this up for you?

We are using free version of komento

does free versin also require to have subscrition to have that answer in forums?

As per stated on Komento plan, the support provided for Komento Free is only community support.
But regarding your inquiry, actually there is no setting to make email to set as mandatory field currently.