Lid locked in closed/ cooking position and can not be open with food inside!
NOT A PHILIPS OFFICIAL VIDEO OR SOLUTION.
First try to set the unit to sauté, adjusted time to 10min; it should run for 4 min and when it reaches 6 min to go it should start to release pressure for about 6 times. This could help in unlock the interlock valve.
Once the time is ended you should heard something clicking (lock valve opening) the lid should be unlocked.
If this does not work you will need to open the lid using tools.
Sharp tools needed used at your discretion.