Error message with Dataflow and a gateway : Status code: 503, description: 'ServiceUnavailable'

Hi, 

My setup is the following : Sql server on-prem accessed via a gateway (last version from June 15th) which I am trying to ingest via a Dataflow gen2 inside a Lakehouse.

Before that update, the download from source to dataflow was succeeding but some tables were failing from dataflow to lakehouse. 

Since that update, the majority of the tables are failing even from source to dataflow with the following message I have never seen before 

Couldn't refresh the entity because of an issue with the mashup document MashupException.Error: AzureDataLakeStorage failed to get contents from 'https://onelake.dfs.fabric.microsoft.com/1d330e6d-c185-4e1b-8bd2-9cfd4dd303ed/fbcdaacd-4462-479d-956a-45d7fbce9353/Tables/6ab6ed1befb64bff8ff6c8cc043e7b5f_FACT_005FCONTRACTS_002Eparquet'. Status code: 503, description: 'ServiceUnavailable'.

Any help on this ? 

Best,

David