Dreams about immobility are usually a sign that you feel trapped in real life. You may have reached an obstacle that you feel that you will not be able to overcome, or you may feel that you not been able to obtain the resources that you need to achieve your goal.
If you dream of being immobile, you may have run out of energy. You need to give yourself time to rest and recuperate.
Dreaming that you are immobile can be a warning that you are taking the wrong path in life. Your dreaming mind is telling you to stop and pay attention to what you are doing rather than continue on the same road.
If you dream that you are in a dangerous situation, for example, you are being chased or in the middle of a busy street, and you suddenly find yourself immobile, you may be in a difficult situation in real life and feel that you do not have the strength to cope with it.