sync function error

Email from user:
I am trying to sync the TESLA data using the python api as recommended in ‘how to download’ on the page https://www.synapse.org/#!Synapse:syn8233127
The directory downloaded successfully earlier, but as I try to sync it again (by running the same script, using the function synapseutils.syncFromSynapse), to take into account the changes you mentioned, I am getting this error: