Postboard showing codes only

Hi

I am running bridge theme and trying the postboard on a test page. Instead of loading the content, the postboard short code loads squares with tag names (I am guessing it is the variable titles).

Wondering if you can help me fix it

thanks
https://www.socialmedia4me.com/stage/test-7

https://www.ads-software.com/plugins/event-organiser-posterboard/