Loading both archivarix and WordPress?

After installing WordPress with Duplicator on an old website, I uninstalled WordPress integration with Arhivarix and installed it (so that the page restored with Archivarix appears on the homepage). My goal is to display WordPress normally, but only the main page to display content from Archivarix.

Yesterday, when WordPress integration appeared on a site, everything went well when I installed it without unchecking it, but now I couldn't go back to that state even after reinstalling it several times. Of the 6 PBNs, 3 have both and 3 only have Archivarix. A server error pops up when all PBNs access WordPress.

What to do to load both archivarix and WordPress?