Here a mockup how it could look like on nodebb.org forum:
Ajaxify is working for all categories, but when I click to go to the profile ajaxify gets hung up.
It is showing the profile data, but I have no clue why is not rendering the profile. I have a highly customized theme, I think it's some bug I have created but I cannot debug this. I was hoping someone has a possible idea why this may be happening.
Let me know if you need more information.
Switch to persona and see if it's rendering, if it is working fine there you might have a syntax error in your template that is causing templates.js to lock up.