Never had this issue before...I'm attaching a template to my project and the tasks in the template aren't displaying. I received a "Success" that the template migrated over. I don't know if it's a View issue but clicked on all possible view options. Would appreciate your thoughts. Thank you!
Instead of your views, look at your filters. Do you have a filter on for only tasks assigned to me, for example, and none are assigned to you (therefore it appears you have no tasks)? Betting it's your task view.
If this helped you, please mark correct to help others : )