JSX expressions must have one parent element

Upgraded from v3 to v4.05 and my javascript gauges broke. It’s using jquery.simplegauge.js and a dataset to create the gauge.
The Optional Javascript box displays errors in v4 “JSX expressions must have one parent element.” The page is blank, like it’s not even trying to create the gauge. I’m not sure how to fix it.
It works fine in v3.

Is there anyone who can help me with this? Right now, V4 is a deal breaker because it’s breaking so much of the work we’ve put into Xibo.