Hey Richard,
Kicking the tires on an older thread. I installed this them component and two things are going on.
First is the message that component needs updating.
[Admin Notice] Theme ‘Reftagger’ contains code which needs updating. (id:discourse.script-tag-discourse-plugin) (learn more)
Second may be related to the first notice where the component needs updating. References are not being tagged and pages seem to hand showing the loading circle in the browser tab.
Would it be possible to have this component updated?