We upgraded from PHP 5.3 to 7.2 and also upgraded the site from 3.6 to 3.8.2 (current)
Here is the live, non-upgraded site:http://www.exploringrobots.com/
Here is what happened after we upgraded (sandbox):http://www.ed4tech.com/exploringrobots.com/
I have no clue on where to address this issue. Everything else on the site seems to function just fine.
Can you offer a solution?