Zwift just dropped a minor update that solves big problems. Zwift typically breaks a few things every month, these small updates usually come slightly after the problem has been addressed and a solution found. Here are the release notes from the forum for this update(there were no features/content added in this update).

• Fixed an issue which would cause FIT files to not be saved correctly in some cases.
• Fixed an issue which would cause a crash when saving an activity if you started your Zwift session by fan viewing another Zwifter.
• Fixed an issue with workouts that would cause power targets to appear higher than they should during rest intervals.
• Fixed an issue which would cause a paired smart trainer or power meter to prevent other devices from being successfully paired.