cannot go to the subway

[howa]

hello éveryone here is my problem I can not go down in the subway to recover the journal note j4 there is like an invisible floor is this normal?

I play in part: solo

level of difficulty: normal

thank you in advance

[ZhingGao]

Have you completed all the previous missions / steps ?
Until you progressed in the story, you can only enter the entrance area and are not able to go further into the subway station.