Error message when combined with locale

When I have both locale and codesnippet enabled, I see an error the first time Drupal tries to translate the codesnippet library's JS.

To reproduce:

1. Install a new Drupal site with standard profile
2. Log in
3. Visit /admin/config/development/logging and turn on error messages
4. Enable codesnippet module
5. Visit /admin/config/content/formats/manage/basic_html and add codesnippet widget to CKEditor
6. Enable locale module (aka "Interface translation")
7. Clear the cache
8. Visit /node/add/page and this error appears:

Warning: file_get_contents(/libraries/codesnippet/plugin.js): failed to open stream: No such file or directory in _locale_parse_js_file() (line 1145 of core/modules/locale/locale.module).
_locale_parse_js_file('/libraries/codesnippet/plugin.js') (Line: 543)
locale_js_translate(Array) (Line: 305)
Drupal\ckeditor\Plugin\Editor\CKEditor->getJSSettings(Object) (Line: 81)
Drupal\editor\Plugin\EditorManager->getAttachments(Array) (Line: 92)
Drupal\editor\Element->preRenderTextFormat(Array)
call_user_func(Array, Array) (Line: 381)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 468)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 81)
__TwigTemplate_8460ff171e698e45071e3decd0edeed75723ba44c8f2a8366f8d148638af9ba2->doDisplay(Array, Array) (Line: 381)
Twig_Template->displayWithErrorHandling(Array, Array) (Line: 355)
Twig_Template->display(Array) (Line: 366)
Twig_Template->render(Array) (Line: 64)
twig_render_template('core/themes/classy/templates/form/field-multiple-value-form.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('field_multiple_value_form', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 448)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 448)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 468)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 47)
__TwigTemplate_6c5aa05d84f37873449338842438a3730774b6faac0ae84e1ef89e49f4e61d78->doDisplay(Array, Array) (Line: 381)
Twig_Template->displayWithErrorHandling(Array, Array) (Line: 355)
Twig_Template->display(Array) (Line: 366)
Twig_Template->render(Array) (Line: 64)
twig_render_template('core/themes/classy/templates/content-edit/node-edit-form.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('node_edit_form', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 62)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 98)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 77)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 628)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)