[MM3-users] Website 404 error

Hello

I'm running Debian 12 with the latest version and installed mailman3 via apt install-mailman3-full. Everything works, I'm using MySQL as the database.

There's something strange, and I can't find a source/solution. When I first access the website domain.nl/mailman3, it's redirected to domain.nl/mailman/postorius/lists/, resulting in a 404 error (3 after mailman is missing). When I accessed it a second time with the same link (domain.nl/mailman3), I was redirected to domain.nl/mailman3/postorius/lists and the welcome page appeared.

This is strange...

I tested it on a mobile device with Chrome and Firefox, and on a desktop with Chrome and Edge. All the results were the same.

Is there a specific file to look add?

Regards, Peter