XCode 12.2 failed to create provisioning profile or no provisioning profiles were found for Flutter app

Hi guys, I'm a beginner Flutter developer here. I have already developed my Flutter app and would like to publish an iOS app of it to the App Store. But it gives out the error when I run the "flutter build ios" or "flutter build ipa" command

I'm using Windows 10 now and running a MacOs Big Sur 11.0.1 in a Virtualbox. I am currently using Xcode 12.2 to open the Runner. When I open the Runner, it gives me this error message in the Signing and Capabilities tab.

I have already created the Identifier, created an app in the App Store Connect, and also created a provisioning profile for it.

Can you guys help me out with this and advise what exactly am I missing? Thanks.