can you please try to reinstall the client from MyStandard or www.standardinstall.com? As you mentioned maybe it's related to MacOS client issue: https://partners.hansaworld.com/forum/viewmessage/13/3376
Hello,
We also have a customer on windows who is on 2026-02-28 having the exact same error message after updating.
The title of the messagebox is in our case is: "C:\Program Files(x86)\Han...