Hi - just installed Calligra suite to give it a try. Went to https://calligra.org/, then clicked on Users and then Calligra Handbook. I got taken to https://calligra.org/users/true, which is a page not found page. Not a good look.
So I go back to the user page, and click on Check Calligra on KDE Forum, and got taken to https://calligra.org/users/nil, which is also a page not found page.
Googling about, I see a load of references to documentation on docs.kde.org, but that is pretty minimal. There is a page with a heading Other Calligra Manuals that says “For detailed information on the different Calligra applications, please consult their respective manuals.”
Well, I don’t want to be rude, but it’s not a good look when links out of your web site don’t work and there doesn’t seem to be any documentation at all.