no idea why it keeps printing the plot from model.py + other unresolved bugs

fitter.py

@@ -22,7 +22,7 @@ class Fitter:
         self.current_fit_range = current_fit_range
         self.fit_results = {}
 
-        self.tspan = self.time_points
+        self.tspan = [0,1000]
         self.dt: float = 1  # 1.0
         self.time_points = np.arange(*self.tspan, self.dt)