Joomla 3->4 upgrade, sermonspeaker "error updating component"

Sure, there's two sites I'm updating, but the errors are the same.
www.thereformedchurch.net
I've enabled maximum error reporting for now (I'm hoping that's helpful), will switch it off later.
apologies for the site appearance... It's way out of date!

My guess would be that there is an outdated layout for the single sermon view.
If I specify a layout in the URL (eg www.thereformedchurch.net/component/serm...d=101&layout=content ) it works fine.
So you could just select one of the current layouts (allinrow, content, extnewline, icon) and it should work.

If you have a custom layout, you may have to adjust it. Instead if the line with behavior.tooltip in it, you ned to use "HTMLHelper::_('bootstrap.tooltip', '.hasTooltip');" now.

Brilliant! I can't say thank you enough! Yes indeed, the layout selected was an odd one. I can't remember setting it, but that fixed everything.
Thanks!