Hi @lutra
if I have noticed this topic earlier, there would have been no need for you to raise a support ticket as I had the very same issue with the contact request form a few months ago and submitted a ticket. Viki responded and told me that I needed to have all cookies enabled on the help site in order for the content request form to appear and be used.
I think it has something to do with the fact that it’s a Google forms form which is embedded into the help page and as such is rather cookie heavy.
Good thing about help site is that cookies are easy to adjust, so you should be able to just turn them all on in order to use the contact request form and then turn them off again when you have finished using the form. If you don’t want them enabled
The link to adjust cookie settings on the help site should be towards the bottom right of any page on the help site.