the pi doesn't run debian, it runs raspbian, so probably https is not supported on the raspbian repo's. certainly downloading a debian package won't work on the pi. These are specific instructions to install Sonarr on Raspbian.
1 Add lamb and garlic. 2  Stir the lamb to break up, about 5 minutes. 3  Stir in tomato paste and cook for 1 to 2 minutes. 4  Stir in carrots, bell pepper, bay leaf, cumin, salt, black pepper and parsley. 5  Saute until carrots are soft. 6  Add water and bring to a boil. Stir the lamb to break up, about 5 minutes. 2  Stir in tomato paste and cook for 1 to 2 minutes. 3  Stir in carrots, bell pepper, bay leaf, cumin, salt, black pepper and parsley. 4  Saute until carrots are soft. 5  Add water and bring to a boil. 6  Turn heat to low and simmer, covered, about 30 minutes.
1 Preheat the oven to fan 200C/ conventional 220C/gas 7. Season the lamb generously with salt and pepper. 2  Heat a large, heavy frying pan over a moderately high heat and brown two of the racks well on the meaty sides for about 1-2 minutes, then turn and brown the other sides for a further 1 minute. Stand the racks of lamb in a china or glass baking dish, scatter the garlic and rosemary over the top, and drizzle with the olive oil. 2  Leave to marinate for at least 4 hours (or overnight if you have the time), turning occasionally.