Due to change in the way SMAPI is packed for v3.13.0+ @Pathoschild has advised us that the installer needs updating. Yep, Stardew Valley 1.5.5-beta migrates from .NET ...
From Vortex 1.6.11+ when the SMAPI is started via the Vortex shortcut on the dashboard with Stardew Valley Expanded installed there are numerous log errors that do not appear when launching SMAPI ...