Please contact your library.
If book expired, then surely it must be a borrow book.
What if the book was not from the Library? Yoda says she/he bought the book. Shreya assumed the book was from the Library. If I buy a book I expect it to stay on my shelf.
I have several books that I haven't yet read that now say expired. I have no idea why they expired. None of them were from the library. I downloaded all of them.
Try downloading the book again