I've setup a sandbox site to play around with Joomla 4 and JD Paris.
Most of it seems to be working fine, except the Article Blog page (which does work in the default Cassiopeia template).
When I create an Article Blog page, I get a "500 - Server Error". The error report of which is included in attachment 2.
I then noticed that the folder "Models" as mentioned in the error report was not present in com_content, so I copied it from the quickstart files. That gave a result (though not the one I wanted), see attachment 3.
Anything I can do myself to repair this?? The Blog pages are quite essential to me.
JoomDev is not affiliated with or endorsed by Open Source Matters or the Joomla! Project. The Joomla! logo is used under a limited license granted by Open Source Matters the trademark holder in the United States and other countries.