page not found /plugin.js?t=q80tj3

I'm running core 8.8.4
I updated my root composer.json with the repository info given on this module's home.
I ran composer require drupal/wysiwgy_template
I didn't see the templates, so i ran composer require ckeditor/templates

I now have the wysiwyg_template directory inside docroot/modules/contrib AND
a templates directory inside docroot/libraries
The ckeditor library version is 4.11 (i tried updating to 4.14 but received a message that the module only worked with 4.11)

I created a few simple templates - just basic divs for alert styling.

When I put the "insert template" button into my text format, the toolbar and body field do not load while in node/%/edit
When I run drush watchdog:show i get:
page not found Warning /plugin.js?t=q80tj3

When I right click on the node's body field and select inspect, I see:
Uncaught Error: [CKEDITOR.resourceManager.load] Resource name "templates" was not found at "/plugin.js?t=q80tj3".
at CKEDITOR.resourceManager. (ckeditor.js?v=4.14.0:257)
at d (ckeditor.js?v=4.14.0:252)
at Array.n (ckeditor.js?v=4.14.0:253)
at w (ckeditor.js?v=4.14.0:253)
at HTMLScriptElement.CKEDITOR.env.ie.d.$.onerror (ckeditor.js?v=4.14.0:254)

It looks like the reference to plugin.js is wrong - but I'm not sure where!