I'm just trying to upgrade from D9, latest version, to D10, latest version. I followed the steps in this document and succeeded until #4.4, which means that D10 is installed and 'composer install' is executed, everything successfully without any errors. But now, when I visit my site, I get an HTTP error 500, internal server error. That means also that I cannot run database updates.
I needed to sync Commerce product data to an external service and tried the API client approach first — query Drupal's entity system from outside. It broke between stores because every store has different field configurations, entity references, and content types. An API client that works for one store fails on the next.
I want to run PHP unit tests that run on all Multisite sites. But when I run the tests on site “B,” everything uses the default site (“A”) as the database.
Does anyone have an example of how to configure this? Or is it not possible?
