@KanashiXI @Metathronos thank you for the info!
@KanashiXI Do you use the 5.9 version of the app? If so, this must be the Sketch cloud api’s issue, so we can only recommend you to wait for a bit and check once again 
But if you use any earlier versions, please update the app to the latest one (5.9), as it contains all the necessary fixes we can offer.