Cannot submit revision of preprint in bioRxiv (Current Version Status Closed)
I contacted the bioRxiv Team. They replied saying that "The system automatically closes submissions if they are inactive over the allotted period of time. We can have this reopened, but first we need confirmation that your paper has not yet been accepted or published in a journal."

I then asked them "How long is the duration of inactivity leading to closing a preprint for revision, since I couldn't find any specification in bioRxiv's website."

They replied that "The timeline for closing a submission that is in progress is two weeks."

Thing is that I couldn't find any mention in their website about closing to revision after a two-week period of inactivity since initial submission; actually, their FAQ says that "An article posted on bioRxiv can be revised at any time, until it is accepted for publication."