Setting the cutoff frequency of an active bandpass filter (op amp) and finding the phase in LTSpice
This is a classic in this type of analysis but also when people using SPICE do not look at operating points. When you run ac simulations, always take a look at the operating or bias point calculated by the simulator. This is where small-signal analysis is performed. Should this dc operating point be wrong, then the engine delivers results which correspond to what has been given to it: garbage-in, garbage-out or GIGO applies well to this situation.
In the below picture, when you print the bias points, you see that the op-amp output in the left-case is grounded meaning the IC is not properly biased at rest. And this is normal, with a single supply, you need to bias the op-amp somewhere between its upper and lower stops.

In the right side, by adding a bias to the (+) input, the op-amp is now biased at a 6-V output and operates in closed-loop as it wasn't before as correctly pointed out by Bimpelrekkie. When you restore the bias, the below curve appears, nicely showing the op-amp limits as frequency increases:

Rather than using the 10-k resistors at the (+) pin, you could also provide another supply at the VEE pin (-12 V) now symmetrically supplying the op-amp. No additional bias would then be needed.