Validator blocked by old robots.txt file


I previously had a password protected Tumblr which I have since removed the password to. When I try to validate the OG card tags, I get the following message from the validator: “Fetching the page failed because it’s denied by robots.txt.” I have tweeted a link to my tumblr but that was several days ago so it seems I am not able to trigger a recrawl from Twitter. Any suggestions about how to move this process forward?