Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
Namespace not specified. Specify a namespace in the module’s build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

I am doing in app in flutter, and I want to include the option that users can create business account and sell their own subscriptions where people get access to what they are posting on their profile after buying it. What package/payment method I should use? there are any examples of this? I heard something about stripe? but I don’t know if they have this method or if there is something else? for what I should search on internet?

I have this error with flutter_stripe_payment: