When crating a forum, some pages must be created and to those require some special components which must be added.
(see old docu: http://docuold.magnolia-cms.com/modules/forum.html#Step5Createpages)
After clicking save while adding the components, the page gets reloaded and some of required request parameters get lost.
Theses parameters are important to allow the components render appropriately.

• forumId on the page „thread-list“ and „create new thread“
• threadId on the page „message“

Mostly ever when viewing this pages in the pagesApp, the req.-params are missing, which leads to an error in the template-script, which shows the yellow freemarker-exception-stack-trace.
This is very irritating for a content-editor!

Fix the freemarker-scripts in a way, that the render doesn’t throw an exception and show a usefull comment why the cpomeponent cannot be rendered properly currently and probably add a link in that comment with a proper URL with thhe required req.-params to properly display the forum-comps.