I submitted a test build and it shows up on my messenger app but it never loads it is just always stuck at 0%.
Has anyone else ran into this issue or have any ideas on how to solve it?
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You need to add instant game plugin to your project.
EDIT: also remember to change your uploaded zip file to production state (you can find it at web hosting section on your FB developer page)
yeah I guess when you go to create a test version of the game you need to readd the instant games plugin.