Data Refresh Failures

Hello,

I am running a standard Power BI license with Personal Gateway and attempting to 'Refresh Now' & 'Schedule Refresh' on my datasets which I have published to Power BI Service.

For my dataset which is ~2.5GB, I get this: "Memory error: The memory used for the current operation exeeds the memory limit for the workload group 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'. Memory allocation failure. If using 32-bit version..."

I have another dataset which also fails on load. I get this: "Credential in the cloud is missing".

Any thoughts? I recently downgraded from Pro license to Standard license.