Steps to reproduce

1. Generate Magnolia DX web app with archetype
2. Install livecopy module
3. Enable i18n for livecopy authoring by setting /config/server/i18n/authoring@class property to info.magnolia.livecopy.i18n.LiveCopyMultiSiteI18nAuthoringSupport
4. Restart the instance
5. Login and access feeds app

Expected results

App is open correctly

Actual results

An error occurs error.txt

Workaround

Development notes

Very same test with demo bundle doesn't produce the error. Classpath of both installations have been reviewed. libs.txt libs-demo.txt
Noticeable differences (among other):

• Content editor and block API in demo bundle are 2.1.6 whereas in archetype-generated war are 1.3.14
• Demo bundle contains magnolia-content-tags-integration
• Demo bundle contains magnolia-pages-content-tags-integration libraries
  None of this libraries seem to be related with the error though.