and the links do not work
Not Found
The correct link for the statistics for the whole pool is:
https://solo.ckpool.org/pool/The link works fine.
The requested URL was not found on this server.
Apache/2.4.41 (Ubuntu) Server at solo.ckpool.org Port 443
this link works fine, too.
You need to add the user (=bitcoin address) as suffix after the slash '/' so you get the statistics for that user. Try this example here to see how it looks like:
https://solo.ckpool.org/users/bc1q5a9nq66jckw3aqfpv5h93ha24dz4d86cpp7d0p