GE Spectra XL44 (GAS STOVE) oven turns off after temp is reached

Once my GE Spectra XL44 (GAS oven) reaches temp it turns off and doesn’t come back on. I turn it off and reset it back to the desired temp and then it works until it reaches temp again and cuts off and never turns back on and I would have to do this over and over to keep baking. Does anyone know what is wrong with my oven it just happened tonight. Also, what parts do I need to order. I hope to get this fixed ASAP.