'Unable to connect to data source undefined'

Hey,

I am currently operating several reports using the on-premise gateway.

The reports see a scheduled daily refresh in the morning. Until sunday, everything went quite well, with few issues over time.

But since sunday, no scheduled refresh succeeded, promting the "Unable to connect to data source undefined" Error.

I tried running the embedded queries (the reports pull data from one data warehouse and multiple tables in it) manually using the MySQL Workbench, yet, those queries did not succeed. Since they havent been changed after uploading the reports to the cloud, I must assume that the error is caused on our end of the line (software changes, network changes). However, I havent been able to solve the issue until now, still searching for the root cause of the issue.

Are you aware of any changes to your local infrastructure (network, databases, software)?

Best

Seb