Abduction Chapter 1

[late]

hi, so i went to the archives. i searched all rooms, and when the first monster breaks the door that is normally stuck i ran away, i then went to check the other rooms behind that door but didn't find anything and decided to go back to the atrium and check the other rooms first. after finding every other piece of glass i didn't know where the last one was. when i watched a walk trough. i saw that there actually is one in the archives. when i went back to the archives, there was no monster to break the door, so the door "is stuck" and i can't get trough to get the last red piece of glass. is there actually any way that i could get trough that door? I don't want to play this story from the beginning again. anyone having the same problem? could someone help?