Add the Discussions Standard Action

The way for end-users to create a discussion thread in one record, or add a discussion message in an existent thread is by the Standard Action 'Discussions'. This Standard Action has to be in the View object of all the transactions that you want to have Discussions enabled.

This is done automatically by WorkWithPlus for Web when you run the Design System Wizard, as it adds the Standard Action in all the templates of View:

The WorkWithPlus Pattern Settings, Transaction template (Main) tab, shows the View - View node tree with TableMain, TableViewRightItems (a WWLink to TRN_DESCRIPTION, Standard Actions Subscriptions and Discussions), Tabs position, Events & Subs, and Variables; a red arrow points to a chat/discussions icon at the right of the tab bar in the preview, which shows tabs General, Email, Person Split, Person Split Tabs, and Project desc.

So, if you had WorkWithPlus for Web in your KB, and transactions with the Pattern applied, you need to make 'Build all' after running the Design System Wizard in order to visualize the 'Discussions' action in your view objects. It is important that if this is your scenario, you make WorkWithPlus > for Web > Pattern instances > 'Mark all instances as updated' prior to run the Design System Wizard to enable the Discussions Module, so that when WorkWithPlus for web makes the 'Update all instances' process (at the end of the import process of the Wizard), the only changes that apply is adding this Standard Action.