GA4 event metric not showing on Looker scorecard

Hello! 

I have a GA4 account that I connected to Looker studio through the GA4 connector. This connector extracts one of my keyEvents. It is not a custom metric. It's a key event already configured on GA4. When I place the metric on a scorecard or a table, it always shows the following: 

Data Set Configuration Error
Looker Studio cannot connect to your date set.
Failed to fetch data from the underlying data set.

Is there something specific to the GA4 connector that is causing this error? Is there something I should set or configure?

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