2017-09-09 You should disable Adblock Plus (Chrome) in Alfresco Chrome Context: You are using Alfresco Community v5.2.0. You are using Chrome with Adblock Plus. Problem: “New Topic” button on the discussion forum disappear. Reason: Adblock Plus added “display: none” to the area that has the “New Topic” button and the RSS feed button, if you subscribe some filter list. Solution: Set Adblock Plus to “Disabled on this site” on Alfresco site. This operation adds the site to the whitelist in Adblock Plus.