Q: How can I add a album from "photos" to "iweb"?

try moving the album to your desktop and upload from there as a work around.

Support for iWeb ended in 2011, and 2012 Apple finally pulled the plug on MobileMe/and effectively iWeb.

There are many alternatives out there for WYSIWYG, a few that come to mind: squarespace,everweb, weebly, Jimdo

Mondhase wrote:

 

... better for the future.

Does not pay to slip too far behind in the technology or the software.

Good computing !

iPhoto still works with MacOS X 10.10.3.

If you did not trash your iPhoto Library after you migrated it to Photos, iWeb should still be showing the iPhoto Library in the Media Browser. It will take a few minutes to appear.

There is no reason to uninstall iPhoto and trash its library, because the new Photos Library and your old iPhoto library or Aperture library are sharing the photos using hard links. And some features of iPhoto are not yet supported in Photos, for example batch changing titles and descriptions, or assigning Places to photos, star ratings.

See:  Six Colors: The (hard) link between Photos and iPhoto

Photos saves disk space by sharing images with your iPhoto or Aperture libraries - Apple Support