Unfortunately, it looks like both Sync and Jerboa do not yet support the backend changes made in version 0.19 π
I didn't really want to upgrade to 0.19-rc yet because I was worried that something like this would happen, but the CSAM/Moderation problem has come up often enough that I felt it was safer to have the better moderation tools and risk some breakage.
Hopefully Sync and Jerboa will be updated soon, as 0.19 should have it's full release any day now. If you're willing to try some other mobile apps in the meantime, here are some that are already 0.19 compatible:
Apologies for the inconvenience. π
Hey, sorry I missed this. Not sure what's going on with that - the post you've got there is deleted though.