McGowan was surprised to find herself locked out of her @rosemcgowan profile on Wednesday night, and posted on Instagram a screengrab of a telling-off she received from the milliblogging website.
The message from Twitter did not explain why McGowan's account was frozen, although informed her she had broken the network's rules, and that she needed to delete the offending tweets to restore her account.
In a statement last week, Weinstein, who is now facing police probes, said: "I realized some time ago that I needed to be a better person and my interactions with the people I work with have changed.
I appreciate the way I’ve behaved with colleagues in the past has caused a lot of pain, and I sincerely apologize for it."
McGowan herself reached a $100,000 settlement with the mogul in 1997 following “an episode in a hotel room during the Sundance Film Festival,” and signed a non-disclosure agreement.
Twitter served only to fan the flames when it refused to explain why it had locked McGowan account, saying that it "doesn't comment on individual accounts for privacy and security reasons."