There is some problem on GoodData API since about 12:00 CEST (10:00 UTC) which causes failures on some model updates and data loads. We are investigating the problem with GoodData support and will keep you updated.
UPDATE 16:15 CEST GoodData support is still investigating the problem but our logs show that it didn't appear again almost three hours. Preliminary report indicates that they had some troubles with connection to S3 storage where LDM models of projects are stored.