The first info needed is: is this work newly created and have you published 4k words for it? Chances are high the book is currently in the veto process. Takes 3 to 5 days to complete with weekends and holidays delaying it a bit.
Next, if its NOT a new book the question becomes did a recent chapter include Chinese, Korean or Japanese characters, certain emojis, or attempted to force italics/bold with say unicode or such? If any of this is answered with yes then the book was blacklisted by one of webnovels automated systems. The offending text needs to be removed and someone needs to be contacted so the book can be whitelisted... I'd say who but it seems to change every few weeks... so best to hop on discord and ask for assistance