take a needle and poke a hole in it! j/k
you can get appolstry glue. your gonna have to take the door pannel off, lay it down on a table and peel the fabric off slowly, re-glue the hard frame and lay over the fabric again. your gonna want to do it slowly and progressively stretching the fabric over to make sure it does not dry up with wrinkles, do inches at a time. you can get the glue at any large craft store or many fabric stores will carry it.
next week on "learn with Musashi" we learn how to fix dangling head liners.