Hello. I am trying to use the example export/import templates to migrate from Joomla 3 to 4. Due to the ancientness of my J3 (and a lot of out-of-date modules), I am attempting to port the posts over using RO CSVI into a clean copy of j4. I have recreated the menus and categories and have the same ID numbers.
Exporting works, and Importing *seems* to work, however when import, only two (out of 880) shows on the webpage. I see all the posts in the article list in the back end, with all of them being "uncategorized." And if I try to edit any of them, I get "Invalid controller class: article".
What am I missing?