unable to open a ticket

I am on this page Submit a Ticket / Common Support and I have filled in all the fields, however, when I click on “send the ticket” a message indicates “no valid check type!”
I don’t understand
Please let the right person know to fix the bug.

That’s author specific support so no one in the forums will be able to shed light.

Try contacting the author directly

Thank you, but as indicated, it is impossible to send them an email…
So we turn around…

Use item comments, or via their profile on themeforest etc.

Thank you
I used this area: Screenshot by Lightshot

That should work