Issue with info_box_content it is blank even when running the code from the docs.

[Omar El Omeiri filho]

Hello,
I was trying to tell est some code from the documentation, but can't seem to make the info_box_content show up correctly. I've tried to tweak it as much as I could. What could be the source of this problem?

Thank you very much!

here is a screenshot

https://drive.google.com/file/d/1G25RfA-CgJn8w4GhDnYv3b-wFBpXejcx/view