Don’t mess with it. Leave it until the spring and maybe do as Pat says and just adjust the cover to loosen any tension. Anything you try to do now will either result in damage, or injury, or both. Plan to open early in the spring when the water is still cold and see how early you can get someone out to look at it. Depending on the condition of the liner, you may need to replace it so I would start setting aside money for that. Repairing a liner is an option if the damage is minimal but you won’t know until the source of the leak can be determined.