Hi Davor:
I just tested with Emacs 25.3 on MacOS and Hyperbole 7.0.0.
I started Emacs with "emacs -q" and did:
{M-x package-initialize RET}
{M-x load-lib RET hyperbole RET}
{C-h h w s}
{C-h h w y}
and it all worked fine. You did however point me to an error
in the PopRing that was never noticed; thanks for that.
Something must be wrong with the hyperbole-autoloads.el file
built when you install the package (though it built fine here).
First, look at that file in your hyperb:dir directory and
see if it has any autoload entries for hywconfig commands.
If it does then something in your initialization process
is not loading it properly.
Bob