Sometime, the CI can fail to produce test-free nightly builds, the builds are not uploaded to the nightly page of paraview.org.
If you still want to download a recent gnithly, you can head to https://open.cdash.org/index.php?project=ParaView , look under the section “master-packages”. Look for the yellow building block icon, like below, and click on that.
That will bring you to a page with downloads.