Passing a string to `style` causes error without helpful message

I absent-mindedly passed a string to the style prop of html.Div and got a simple "Error loading dependencies..." result with nothing in the Python console and an obscure React error in the JS console. Would be nice to have something more helpful.

Reproduce the issue with a Python html.Div whose style prop is a string, then inspect the Python and JavaScript console output described in the report. Trace the style prop handling from the component entry point and make the resulting error explain that the prop value is invalid.