I set up the Tags module for a client that is running multiple domains—currently five subdomains, using the old subdomain protocol vs the new MSM. Tags works wonderfully on the primary domain, but generates a syntax error: {exp:tag:tags_from_field} on all the other domains. Now typically, this type of syntax error only happens when calling a plugin or extension that is no longer installed; but the module and associated file IS installed, and working correctly for the primary domain.

I know typically if you register an item—module, plugin, extension—it becomes available for every url that is using the same EE install, but this doesn’t seem to be happening for Tags module.

Here’s a page that generates the error:
http://www.housing-information.org/articles/home_insurers_canceling_in_east
Updated the error page no longer displays the error, the issue is till relevant, I just put in a domain check, so that people could access the site pages. Since before the error stopped the page from loading.

And here is its related page at the main site
http://www.consumer-action.org/press/articles/home_insurers_canceling_in_east

Keywords are only visible to staff, as we test and implement the functionality. But the tags are working as expected. Both sites use exactly the same template data (in fact the exact template), we handle header, sidebar, footer via a domain script.

Is there something I’m doing wrong in the configuration of is this a limitation of the Tags module??