It is not just Lightroom 6 Help that fails.
It is also lightroom 6 Library Help that also fails.
As well when the work around "Adobe Photoshop Lightroom Help | Lightroom Help" is used,
though it works the pointer to the Photoshop/Lightroom cc/lightroom 6 also fails: it starts then fails with:
"expected a dict object"
Lightroom 6 itself runs fine uses the GPU and so on.
Is there a timescale to fix all this and will it require a patch to lightroom or are the links etc; going to fix it?
I have been able to download "lightroom_reference6.pdf" while I was running around in circIes; I just cannot remember how this morning.
Yes, that error appears if you click on the link on the left hand side under Help PDFs
but if you right click and "save target as", you can download the PDF