USPS tracking link brings up Deceptive Website Warning on Safari?

[smiles1012]

Not sure the best place for this, but recently when I try to click on the tracking number of an item I've purchased so I can go to the USPS site it was bringing up a blank page. Today I got this... multiple attempts brought up the same page. 

[jealo2]

I got this same thing earlier today. I ordered a package coming from another country. I’m using the eBay app, and whenever I try to click on the Tracking Number (which usually brings me to the USPS website), it’s giving me this red screen with the words Deceptive Website Warning. Has me worried I’m getting scammed and the scammer is using a fake tracking number. I don’t know why it’s showing this. I also tried independently going to the USPS website, going to the tracking tool and manually typing in the tracking number but I’m getting the same thing.