Unfortunately, I spoke too soon. I was able to replicate the error.
I reinstalled my components and after installing Guru, I deleted the automatically created menu item, "iJoomla," emptied the trash, then I tried to create my own Guru Category List Layout menu item, and I received the following error when I clicked the save button:
Error
Save failed with the following error: MenusTableMenu::_getNode(1, ) failed.
Thank you