Hello @Joseph_Valenciano
Wondering if this has been solved for you or still stuck in that.
The process might have stuck when any needed field will not exist in Content (Knowledge Graph) on platform. Since the process includes the use of needed entity types and fields, those needed to be created and available on platform to successfully run the process.
In Sandbox account, while populate your Content with seed data facility has been used, the needed type and field could get exist accordingly.