If all your animated jetways at all airports have stopped to work, that can be caused by on of the 3 items I've explained in the previous message, plus of course the one added by Bruce, that jetways might not activate if you are not in the correct position (stopped too early or too late).
The only sure thing, it can't be caused by any of our installers. In fact, one of the things that might go wrong, which is the missing "Advanced Animations" flag, is being set to the correct (enabled) value by the GSX installer, in case you turned it off inadvertently.