Looks as though the file (groups.ttl) which lists your groups doesn’t exist. A new address book should have a an empty file there ready tp hold the groups. If you go to https://phraingck.solid.community/public/ (which normally world be public but isn’t in your case) then you could try to create a new empty file of that name.
Adding to the top of this Reply to share how I got it working with help from timbl (who noted that my public folder wasn’t), TheodoraPetkova (who demonstrated how to change sharing on a resource):
In my case, the resource was my public folder. At some point, I must have inadvertently deleted “Everyone” from “Viewers” in Sharing for my public folder.
In addition to creating a “groups.ttl” file as suggested by timbl I had to create a “people.ttl” file. In both cases I had to ignore the “workspace” error message and specify “phraingck.solid.community/public/” above the “Start new sourceat this URI” button.
I’m now able to add groups and contacts within those groups.
This community rocks!
Gave that a go, but no luck. Now I’m running into the “make a new workspace” problem. More on that later.
I obtained a new POD from inrupt.net then played with a few apps per the excellent post by Don Tai:
Yes, ignore the workspace question for now. We thought at one point that it would be useful to have named workspaces to keep track of places on different pods which they shared with different people. There is a vestige of that when you create a new thing with no contact, in the home pane. The idea is that users should go through life without having to worry about URLs.
If you create things in the folder pane, or the meeting pane, then there is no need to ask where to put the new thing, as it is put in the folder or the meeting. You just have to give a short name for the last part of the URL. I always use those in fact to make new things.
It may be that we bring the workspace idea back in some form particularly for mobile where no one wants to typing large URIs.