I have a client site where there was a custom YouVersion button added to WYGWAM that stopped working after updating all the things.
It's working on an Ee 2.6.1 / Wygwam 2.7.1 site. It's now running EE 2.10 Wygwam 3.3.3 and not working.
There is a YouVersion folder/addon installed in: /themes/third_party/wygwam/lib/ckeditor/plugins
"YouVersion" is specified in the Wygwam config, alongside a drop-down value of "extraPlugins".
The YouVersion button just doesn't appear. Nor do any of the other I see in the plugins folder and add in the extraPlugins list.
This is on a dev server, but I didn't see any pathing specified that might be affecting things.
Anything else I should look for?