This question already has an answer here:
take the example of earth sun system. The earth is said to orbit around sun because the sun bends the space time around it .
Now if by some means we stop earth in its path such that its at rest with respect to sun then release it , it will immediately start a free fall towards the sun .
Now the question is if the gravity is just bent space time then what is causing the earth at rest to move from rest. What causes the force?
how can you explain both the Einstein bending of space and newtonian force of gravity existing simultaneously?