I’ve just updated to v1.1.11 (Qt6) under Windows 10, and the application doesn’t connect to Syncthing anymore at all. I’m guessing that this may be related to the “Schannnel instead of OpenSSL” change you mentioned before.
I’ve switched to the Qt5 version for now, which works normally.
For the record, these are typical settings that I use (working in the Qt5 version).
