So, can you open it before? If it can't be opened before, it is likely that there is something wrong with the website program. If you can open it before, but you can't open it now, then the second page file is likely to be lost or damaged.
I don't know much about you now. Is the second page you said a list page? There are corresponding page numbers 1, 2, 3, 4~ and so on, or previous page, next page and so on. If this is the case you are talking about, it is likely that the website program code is imperfect and wrong, and people who know website development need to modify the code.