AppFlow Error when connecting to SharePoint via AWS managed client app

Hi, when I try and connect to Sharepoint via AWS managed client app I get the following error after I return to Flow configuration page.

1 validation error detected: Value '' at 'nextToken' failed to satisfy constraint: Member must satisfy regular expression pattern: \S+

I have Granted admin consent MS Entra > Applications > Enterprise applications > Amazon Appflow sharepoint application > permissions