First make sure that you're referencing correctly to the variable, so check the developer info of that page.
Also make sure you are printing the variable correctly
{{ xxx.xxx }}
But most importantly:
There is currently a bug within hubspot, causing variables not to be printed (not all but it seems starting from a certain level).. Hubspot knows this, has confirmed this, and has passed this to development.. At least, this is now a month ago..
It's quite a crucial bug imo and I'm surprised they haven't fixed it yet..
It certainly won't harm to contact support, maybe if they feel more pressure they'll give this more priority?
If there is one thing Hubspot should work on, it's the way they offer support.
Sometimes support helps me out perfectly, sometimes I get someone who directs me here.. they're really not consistent in the way they help - really annoying!
Can you perhaps show me the page you're testing on 😉