Unable to Access Tumblr Due to Security Error After Getting a New Phone

When I try to access Tumblr, I keep getting a message saying the site doesn’t provide a secure connection. I’ve also tried logging in through the app, but it gives me an error there as well. I bought a new phone a few months ago and thought the issue might be related to that, but I was able to use both the site and app right after getting the phone. Now, neither works, and I can’t figure out why. Tumblr, please resolve this issue quickly so I can access my account again! This is very frustrating, and I need a solution immediately.