When I try to add a chatmail relay, I first get this dialog:

When I press "Yes", I just get shown the relay list again, but with no relay added. There is no error message shown inside deltachat-desktop. However, the log shows this message, which looks like a chatmail core error:

2025-12-20T22:46:20.388Z renderer ERROR "\nfile:///app/delta/resources/app/src/App.tsx:125:10" "Unhandled Rejection: Configuration failed. Error: Cannot use multi-transport with mvbox_move enabled." {"isTrusted":true} {"code":-1,"message":"Configuration failed. Error: Cannot use multi-transport with mvbox_move enabled."}

In the DC Community room, some other users ran into this as well when trying to add a relay. So this seems to be a relatively common error. Is it somehow related to using the "Deltachat" IMAP subfolder perhaps? I got that enabled, specifically the only check for mail in that subfolder option.

• Operating System (Linux/Mac/Windows/iOS/Android): Linux
• Core Version: core v2.33.0
• Client Version: desktop 2.33.0 via flathub

Expected behavior

Adding a relay works

Actual behavior

Adding a relay silently fails, log shows error that seems to be a chatmail core error.

Steps to reproduce the problem

1. Try to add a relay

Screenshots

See above

Logs

2025-12-20T22:46:20.388Z renderer ERROR "\nfile:///app/delta/resources/app/src/App.tsx:125:10" "Unhandled Rejection: Configuration failed. Error: Cannot use multi-transport with mvbox_move enabled." {"isTrusted":true} {"code":-1,"message":"Configuration failed. Error: Cannot use multi-transport with mvbox_move enabled."}