Zwift on macOS not uploading

The last 2 rides Zwift has hung after the ride has completed. When I check in the companion app it only shows part of the ride (e.g the last ride was 20KM and the companion app shows 5km).

I have the latest version of Zwift and I am running macOS Sequoia 18.1 on an M1 Macbook Pro.

If I open the ~/Documents/Zwift/Activities folder I can find the .fit files for both rides and manually upload them to Strava and they both show the correct distance.

This is really frustrating and needs a solution promptly.