Because of your project enable the Push Notification , that need the developer certificate.
You can simple disable it in
Project File > Target > Capabilities > Turn off the Push Notification
Answer depends on what is your requirement.
Need to just get rid of the error. Then just disable the push notifications in the capabilities tab in the project.
Need to run on device or create an IPA or your app needs support for push notifications then you need to enroll to Apple developer account and create the required certificates & provisioning profiles to proceed further.
Hope this will be helpful.
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