@Yoon, Sojin , all
Hello all. Sorry for your experience with this issue. From my analysis I found the following:
There was a service disruption on March 6. It has since been fixed. This affected Azure Data Factory, Azure Synapse Analytics, and Key Vault among other services in West Europe region. In Azure Data Factory, Copy Data may be stuck in queue or timeout and enabling interactive authoring for Azure Integration Runtime in Managed Virtual networks could fail.
You can find more details in Azure Status History Tracking ID: R_36-P80
If you find the issue persists, please let us know. I hope this helps.
Thank you for your patience.