"[Crashlytics:Crash] Reporting is disabled"

Make sure you initialize Crashlytics with Fabric before calling any Crashlytics methods:

Fabric.with([Crashlytics.self])

One step I routinely miss is to make sure you've added the build phase on your target:

"${PODS_ROOT}/Fabric/run" ${FABRIC_API_KEY} ${FABRIC_BUILD_SECRET}

and either replace ${FABRIC_API_KEY} and ${FABRIC_BUILD_SECRET} with your key and secret or add custom build settings for each.

There are apparently cases where Crashlytics does not auto-activate new apps so that they show up under your list of apps, even though everything is coded correctly and data is going to their servers. In this case, send an email to Crashlytics support ([email protected]) that contains a copy of the info.plist entries for the app in question and they will activate it for you. I have had to do this several times, especially with app extensions.