Thanks for your report. We are investigating the cause of this, and will update you as soon as possible.
Hi, this should be fixed in Update 74.1. So please head over to https://royals.ms/?page=download and download the Update 73.4 -> Update 74.1 Mini Patcher. You can read the patch notes here: https://royals.ms/forum/threads/server-check-optional-patch-23-09-21.196315