Firstly, most people have issues entering The Grounds if they have preset sync installed. If this is the case, there will be a file called badfile.reminder. Simply open it up in notepad at the time of the crash and see what preset file is causing the crashing, once you figure out which one, you can go ahead and delete that preset file.
If not, or if you want to take an extra step to be careful:
It could be caused by the abundance of floofs in that area, AKA internet traffic. I would recommend turning down your graphical settings, just to see if that would make a difference. Open your game settings, turn off the water reflection and set the view distance to 0 for starters. Try running your game in a different engine, whether that be OpenGL or Direct3D9. You can edit this through the main FeralHeart menu, or editing the Ogre.cfg file.
Hope I could be of help!