How long did you let it cool before cutting into it? Looks like it rose nicely, so I don't think there's too much water in the dough. So either you cut into it while it was still hot, or you need to bake it a bit longer (at a cooler temp if necessary).
It looks like it was sliced while too warm. See how the inside has shrunk back, leaving the crust overhanging a little? That's a tell-tale sign. If the crumb stays a little gummy after the loaf has sat around and cooled well, that would say that more baking was needed.
How long did you let it cool before cutting into it? Looks like it rose nicely, so I don't think there's too much water in the dough. So either you cut into it while it was still hot, or you need to bake it a bit longer (at a cooler temp if necessary).
It looks like it was sliced while too warm. See how the inside has shrunk back, leaving the crust overhanging a little? That's a tell-tale sign. If the crumb stays a little gummy after the loaf has sat around and cooled well, that would say that more baking was needed.
TomP
If it's too wet - don't use as much water. Enjoy!