307 accelerator pedal stiffening

Hello friends, I started the car today, after traveling for a while, I saw that the gas pedal is too hard to press. I didn't push it too hard so I wouldn't damage it. When I press the clutch, the accelerator pedal softens like it used to be, but when I let go, it gets very hard again. Does anyone know the cure for my problem?

In fact, if the gas pedal is electronic, my teacher is wired, okay, I have a problem with the wire. I think you should check the gas pedal, it might be behind the mat or something. because you said it softens when you press the clutch