Camunda Cycle and Signavio modeler

All of a sudden, my saved Roundrip that used to work just fine gives me this error when I cycle from Camunda back to Signavio:

The synchronization of the models failed. Could not perform operation get content information - A node named ‘cycle-import_2017-08-29_14-38-16’ could not be found in ‘My documents’.

Any ideas why?