Since there is no apparent way to submit a bug report about your website, I will try here.
This is the single most annoying "feature" I believe I've ever run across on any website, ever. You should make it possible to log in.
I do have a screen capture, but as this is a public forum and you provide no way to contact you directly with bugs, I will not post it here.
Also, your "Rich Text" comment editor does not work. So, your website is broken, you make it as hard as possible to submit a bug report, and even the support "community" board tools are broken. I have to say this entire experience has been very, very annoying and if this is the care teamviewer puts into their products I will not be using them. I watched join.me go down this route and stopped using them when they made it annoying beyond belief instead of easy, too.