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.
In this example, there is a built-in Ethernet device that uses a driver that supports the RTL8168/8111/8111c chipsets. As we saw earlier, that driver is re0. The built-in wireless device was also found but the "?" indicates that a driver for the RTL8191SE chipset was not found. A web search for "FreeBSD RTL8191SE" will give an indication of whether a driver exists (perhaps in a version of FreeBSD that has not been released yet) or if a driver is being developed. You can also use a web search to locate a Windows driver and try using the ndisgen command, as described in this, to convert it to a FreeBSD driver.
<ref>tags exist, but no
<references/>tag was found