[MediaWiki-l] scribunto: red Script Error non-clickable

In the documentation for Extension:Scrubunto the troubleshooting section indicates that when a red Script error message appears on page, you can click it to view the error message. On my system, this doesn't work at all.

MW 1.22.6 Scribunto (git branch REL1_22) Lua 5.1.5

I've confirmed the extensions requirements have been met. The lua error log I've set up just gets filled with:

TX ==> call RX <== return TX ==> call RX <== return TX ==> call RX <== return TX ==> call RX <== return TX ==> call RX <== return TX ==> call RX <== return TX ==> return RX <== getStatus TX ==> return RX <== getStatus TX ==> return

Any thoughts on how to debug this?

Thanks Bill