Sorry for the inconvenience.  Known Navigation header breakage, its being "rebuilt."
There may be other unforeseen breakage primarily in the handbook portion of the wiki.
The Table Of Contents section of each "PC-BSD® Users Handbook" page may be the best workaround.

Translations:EasyPBI/6/en

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If multiple users will be using the EasyPBI utility, go to Control Panel System ManagerTasks and click the Fetch Ports Tree button. Alternately, use the following command as the superuser portsnap fetch extract. Either of these methods will install the ports collection into /usr/ports.

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