The instructions <https://tiddlywiki.com/static/Installing%2520a%2520plugin%2520from%2520the%2520plugin%2520library.html> on installing plugins with client-server configuration suggest that the plugin has to be listed in the control panel, even though it's not installed via that mechanism:
Client-Server Configuration Follow these instructions when using TiddlyWiki <https://tiddlywiki.com/static/TiddlyWiki.html> under Node.js: 1. Identify the plugins you want to install using the *Plugins* tab of control panel <https://tiddlywiki.com/static/%2524%253A%252FControlPanel.html> (*don't* install the plugins from here, though). Plugins are identified by their type (ie language, theme or plugin) and their publisher and title. For example, the plugin $:/plugins/tiddlywiki/internals is referred to as *tiddlywiki/internals* 2. Quit the server if it is running 3. Edit the tiddlywiki.info file (it is in JSON format) and locate the plugins, themes or languages section (see below) 4. Add entries corresponding to the plugins you wish to add. Take care to retain commas to separate items, but do not terminate the last item in a list with a comma 5. Restart the server { "plugins": [ "tiddlywiki/codemirror" ], "themes": [ "tiddlywiki/vanilla", "tiddlywiki/snowwhite" ], "languages": [ "es-ES", "fr-FR", "en-EN" ] } -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/36b43f8b-c549-458b-9d42-cf94340ccfe4%40googlegroups.com.

