I have just upgraded to XOOPS 2.1.1 and I have 2 problems with new user registration. The error message "Selected module does not exist!" appears when I click the "Register Now!" link in the login block. This is a major problem as you can imagine.

Another minor problem is that several pages on my site no longer automatically reload... I have to click the "here" on the link that says "If the page does not automatically reload, please click here."

In 2.1.1, is there no longer a way to add users from the admin side?

2.1.1 is a development snapshot - I hope you are just trying it out and not using it on a production site!

You need to use the extended profiles module - which must have correct group access. It is a bit of a mess at the moment as it is still in rapid development but you can add users from:

Modules - Extended Profiles - Users