It looks like they changed the layout a bit, but the option to share is still there. Tap on the three dots of an album to find Share and Invite. Enable sharing. Then tap the arrow in the upper left corner. In this window you should be able to change the link access from Invite Only, to Anyone can view.
Can you clarify how you are trying to share the photos? Are you sharing an album to the web, or are you selecting a number of images in the grid and then using the "Share" button at the bottom of the grid? Then what happens when you try to share multiple photos?