Once I install unmanaged package from Apex Specialist Superbadge and check Challenge, I am getting below error.
In email I got below message after I installed unmanaged package -
Package: Trailhead Apex Superbadge (04t36000000i5UM)
Some components, such as custom objects, custom report types, and workflow rules, must be activated using the package deploy process, before they are available to your organization.


Challenge Not yet complete... here's what's wrong:
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: FIELD_CUSTOM_VALIDATION_EXCEPTION, Validation Formula "Term_schedule_requires_subscription" Invalid (Field 00N5000000ASPDU is inaccessible. Please review all fields referenced by the formula. Context: common.config.entity.ValidationFormulaContext): []